SEBA-902 single-olt tests;
Pin protoc-gen-go to 1.3.2 to resolve compatibility issue;
Run go mod tidy / go mod vendor on importer;
Add Go Module support to demotest
Change-Id: Ifde824fc9a6317b0adc1e12bea54ee1f9b788906
diff --git a/demo_test/vendor/modules.txt b/demo_test/vendor/modules.txt
new file mode 100644
index 0000000..26454b6
--- /dev/null
+++ b/demo_test/vendor/modules.txt
@@ -0,0 +1,175 @@
+# github.com/Shopify/sarama v1.26.1
+github.com/Shopify/sarama
+# github.com/davecgh/go-spew v1.1.1
+github.com/davecgh/go-spew/spew
+# github.com/eapache/go-resiliency v1.2.0
+github.com/eapache/go-resiliency/breaker
+# github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21
+github.com/eapache/go-xerial-snappy
+# github.com/eapache/queue v1.1.0
+github.com/eapache/queue
+# github.com/golang/protobuf v1.4.0
+github.com/golang/protobuf/proto
+github.com/golang/protobuf/ptypes
+github.com/golang/protobuf/ptypes/any
+github.com/golang/protobuf/ptypes/duration
+github.com/golang/protobuf/ptypes/empty
+github.com/golang/protobuf/ptypes/timestamp
+# github.com/golang/snappy v0.0.1
+github.com/golang/snappy
+# github.com/hashicorp/go-uuid v1.0.2
+github.com/hashicorp/go-uuid
+# github.com/jcmturner/gofork v1.0.0
+github.com/jcmturner/gofork/encoding/asn1
+github.com/jcmturner/gofork/x/crypto/pbkdf2
+# github.com/jessevdk/go-flags v1.4.0
+github.com/jessevdk/go-flags
+# github.com/klauspost/compress v1.9.8
+github.com/klauspost/compress/fse
+github.com/klauspost/compress/huff0
+github.com/klauspost/compress/snappy
+github.com/klauspost/compress/zstd
+github.com/klauspost/compress/zstd/internal/xxhash
+# github.com/konsorten/go-windows-terminal-sequences v1.0.1
+github.com/konsorten/go-windows-terminal-sequences
+# github.com/pierrec/lz4 v2.4.1+incompatible
+github.com/pierrec/lz4
+github.com/pierrec/lz4/internal/xxh32
+# github.com/rcrowley/go-metrics v0.0.0-20190826022208-cac0b30c2563
+github.com/rcrowley/go-metrics
+# github.com/sirupsen/logrus v1.5.0
+github.com/sirupsen/logrus
+# golang.org/x/crypto v0.0.0-20200204104054-c9f3fb736b72
+golang.org/x/crypto/md4
+golang.org/x/crypto/pbkdf2
+# golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0
+golang.org/x/net/context
+golang.org/x/net/http/httpguts
+golang.org/x/net/http2
+golang.org/x/net/http2/hpack
+golang.org/x/net/idna
+golang.org/x/net/internal/socks
+golang.org/x/net/internal/timeseries
+golang.org/x/net/proxy
+golang.org/x/net/trace
+# golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd
+golang.org/x/sys/unix
+# golang.org/x/text v0.3.2
+golang.org/x/text/secure/bidirule
+golang.org/x/text/transform
+golang.org/x/text/unicode/bidi
+golang.org/x/text/unicode/norm
+# google.golang.org/genproto v0.0.0-20190927181202-20e1ac93f88c
+google.golang.org/genproto/googleapis/rpc/status
+# google.golang.org/grpc v1.29.1
+google.golang.org/grpc
+google.golang.org/grpc/attributes
+google.golang.org/grpc/backoff
+google.golang.org/grpc/balancer
+google.golang.org/grpc/balancer/base
+google.golang.org/grpc/balancer/roundrobin
+google.golang.org/grpc/binarylog/grpc_binarylog_v1
+google.golang.org/grpc/codes
+google.golang.org/grpc/connectivity
+google.golang.org/grpc/credentials
+google.golang.org/grpc/credentials/internal
+google.golang.org/grpc/encoding
+google.golang.org/grpc/encoding/proto
+google.golang.org/grpc/grpclog
+google.golang.org/grpc/internal
+google.golang.org/grpc/internal/backoff
+google.golang.org/grpc/internal/balancerload
+google.golang.org/grpc/internal/binarylog
+google.golang.org/grpc/internal/buffer
+google.golang.org/grpc/internal/channelz
+google.golang.org/grpc/internal/envconfig
+google.golang.org/grpc/internal/grpclog
+google.golang.org/grpc/internal/grpcrand
+google.golang.org/grpc/internal/grpcsync
+google.golang.org/grpc/internal/grpcutil
+google.golang.org/grpc/internal/resolver/dns
+google.golang.org/grpc/internal/resolver/passthrough
+google.golang.org/grpc/internal/status
+google.golang.org/grpc/internal/syscall
+google.golang.org/grpc/internal/transport
+google.golang.org/grpc/keepalive
+google.golang.org/grpc/metadata
+google.golang.org/grpc/naming
+google.golang.org/grpc/peer
+google.golang.org/grpc/resolver
+google.golang.org/grpc/serviceconfig
+google.golang.org/grpc/stats
+google.golang.org/grpc/status
+google.golang.org/grpc/tap
+# google.golang.org/protobuf v1.21.0
+google.golang.org/protobuf/encoding/prototext
+google.golang.org/protobuf/encoding/protowire
+google.golang.org/protobuf/internal/descfmt
+google.golang.org/protobuf/internal/descopts
+google.golang.org/protobuf/internal/detrand
+google.golang.org/protobuf/internal/encoding/defval
+google.golang.org/protobuf/internal/encoding/messageset
+google.golang.org/protobuf/internal/encoding/tag
+google.golang.org/protobuf/internal/encoding/text
+google.golang.org/protobuf/internal/errors
+google.golang.org/protobuf/internal/fieldnum
+google.golang.org/protobuf/internal/fieldsort
+google.golang.org/protobuf/internal/filedesc
+google.golang.org/protobuf/internal/filetype
+google.golang.org/protobuf/internal/flags
+google.golang.org/protobuf/internal/genname
+google.golang.org/protobuf/internal/impl
+google.golang.org/protobuf/internal/mapsort
+google.golang.org/protobuf/internal/pragma
+google.golang.org/protobuf/internal/set
+google.golang.org/protobuf/internal/strs
+google.golang.org/protobuf/internal/version
+google.golang.org/protobuf/proto
+google.golang.org/protobuf/reflect/protoreflect
+google.golang.org/protobuf/reflect/protoregistry
+google.golang.org/protobuf/runtime/protoiface
+google.golang.org/protobuf/runtime/protoimpl
+google.golang.org/protobuf/types/known/anypb
+google.golang.org/protobuf/types/known/durationpb
+google.golang.org/protobuf/types/known/emptypb
+google.golang.org/protobuf/types/known/timestamppb
+# gopkg.in/jcmturner/aescts.v1 v1.0.1
+gopkg.in/jcmturner/aescts.v1
+# gopkg.in/jcmturner/dnsutils.v1 v1.0.1
+gopkg.in/jcmturner/dnsutils.v1
+# gopkg.in/jcmturner/gokrb5.v7 v7.5.0
+gopkg.in/jcmturner/gokrb5.v7/asn1tools
+gopkg.in/jcmturner/gokrb5.v7/client
+gopkg.in/jcmturner/gokrb5.v7/config
+gopkg.in/jcmturner/gokrb5.v7/credentials
+gopkg.in/jcmturner/gokrb5.v7/crypto
+gopkg.in/jcmturner/gokrb5.v7/crypto/common
+gopkg.in/jcmturner/gokrb5.v7/crypto/etype
+gopkg.in/jcmturner/gokrb5.v7/crypto/rfc3961
+gopkg.in/jcmturner/gokrb5.v7/crypto/rfc3962
+gopkg.in/jcmturner/gokrb5.v7/crypto/rfc4757
+gopkg.in/jcmturner/gokrb5.v7/crypto/rfc8009
+gopkg.in/jcmturner/gokrb5.v7/gssapi
+gopkg.in/jcmturner/gokrb5.v7/iana
+gopkg.in/jcmturner/gokrb5.v7/iana/addrtype
+gopkg.in/jcmturner/gokrb5.v7/iana/adtype
+gopkg.in/jcmturner/gokrb5.v7/iana/asnAppTag
+gopkg.in/jcmturner/gokrb5.v7/iana/chksumtype
+gopkg.in/jcmturner/gokrb5.v7/iana/errorcode
+gopkg.in/jcmturner/gokrb5.v7/iana/etypeID
+gopkg.in/jcmturner/gokrb5.v7/iana/flags
+gopkg.in/jcmturner/gokrb5.v7/iana/keyusage
+gopkg.in/jcmturner/gokrb5.v7/iana/msgtype
+gopkg.in/jcmturner/gokrb5.v7/iana/nametype
+gopkg.in/jcmturner/gokrb5.v7/iana/patype
+gopkg.in/jcmturner/gokrb5.v7/kadmin
+gopkg.in/jcmturner/gokrb5.v7/keytab
+gopkg.in/jcmturner/gokrb5.v7/krberror
+gopkg.in/jcmturner/gokrb5.v7/messages
+gopkg.in/jcmturner/gokrb5.v7/pac
+gopkg.in/jcmturner/gokrb5.v7/types
+# gopkg.in/jcmturner/rpc.v1 v1.1.0
+gopkg.in/jcmturner/rpc.v1/mstypes
+gopkg.in/jcmturner/rpc.v1/ndr
+# gopkg.in/yaml.v2 v2.2.8
+gopkg.in/yaml.v2