[VOL-1866] Changed module dependency to v12.0.0 of k8s client-go and v1.15.4 of k8s api/apimachinery in sync with other voltha components

Had to use pseudo-version corresponding to v12.0.0 of k8s client-go
because golang proxy is no longer serving the modules not complying
to Semantic Import Versioning rules including client-go v12.0.0.
Refer to https://github.com/kubernetes/client-go/issues/631 and
https://github.com/golang/go/issues/33558

Change-Id: I2e558bab7f0702f230761319eb5392a7d0532ea3
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 4effeea..58e07d5 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -25,8 +25,6 @@
 github.com/golang/protobuf/ptypes/timestamp
 # github.com/golang/snappy v0.0.1
 github.com/golang/snappy
-# github.com/google/btree v1.0.0
-github.com/google/btree
 # github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf
 github.com/google/gofuzz
 # github.com/google/uuid v1.1.1
@@ -35,16 +33,13 @@
 github.com/googleapis/gnostic/OpenAPIv2
 github.com/googleapis/gnostic/compiler
 github.com/googleapis/gnostic/extensions
-# github.com/gregjones/httpcache v0.0.0-20190212212710-3befbb6ad0cc
-github.com/gregjones/httpcache
-github.com/gregjones/httpcache/diskcache
 # github.com/imdario/mergo v0.3.7
 github.com/imdario/mergo
 # github.com/json-iterator/go v1.1.6
 github.com/json-iterator/go
 # github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd
 github.com/modern-go/concurrent
-# github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742
+# github.com/modern-go/reflect2 v1.0.1
 github.com/modern-go/reflect2
 # github.com/opencord/voltha-go v2.2.0+incompatible
 github.com/opencord/voltha-go/common/log
@@ -58,8 +53,6 @@
 github.com/opencord/voltha-protos/go/voltha
 github.com/opencord/voltha-protos/go/openflow_13
 github.com/opencord/voltha-protos/go/omci
-# github.com/peterbourgon/diskv v2.0.1+incompatible
-github.com/peterbourgon/diskv
 # github.com/pierrec/lz4 v2.0.5+incompatible
 github.com/pierrec/lz4
 github.com/pierrec/lz4/internal/xxh32
@@ -93,13 +86,13 @@
 golang.org/x/net/http/httpguts
 golang.org/x/net/idna
 golang.org/x/net/context/ctxhttp
-# golang.org/x/oauth2 v0.0.0-20190319182350-c85d3e98c914
+# golang.org/x/oauth2 v0.0.0-20190402181905-9f3314589c9a
 golang.org/x/oauth2
 golang.org/x/oauth2/internal
 # golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc
 golang.org/x/sys/unix
 golang.org/x/sys/windows
-# golang.org/x/text v0.3.0
+# golang.org/x/text v0.3.1-0.20181227161524-e6919f6577db
 golang.org/x/text/secure/bidirule
 golang.org/x/text/unicode/bidi
 golang.org/x/text/unicode/norm
@@ -123,12 +116,12 @@
 google.golang.org/grpc/connectivity
 google.golang.org/grpc/keepalive
 google.golang.org/grpc/codes
+google.golang.org/grpc/encoding
 google.golang.org/grpc/metadata
 google.golang.org/grpc/status
 google.golang.org/grpc/balancer
 google.golang.org/grpc/balancer/roundrobin
 google.golang.org/grpc/credentials
-google.golang.org/grpc/encoding
 google.golang.org/grpc/encoding/proto
 google.golang.org/grpc/internal
 google.golang.org/grpc/internal/backoff
@@ -153,9 +146,8 @@
 gopkg.in/inf.v0
 # gopkg.in/yaml.v2 v2.2.2
 gopkg.in/yaml.v2
-# k8s.io/api v0.0.0-20190222213804-5cb15d344471
+# k8s.io/api v0.0.0-20190620084959-7cf5895f2711
 k8s.io/api/core/v1
-k8s.io/api/admissionregistration/v1alpha1
 k8s.io/api/admissionregistration/v1beta1
 k8s.io/api/apps/v1
 k8s.io/api/autoscaling/v1
@@ -172,21 +164,26 @@
 k8s.io/api/batch/v1beta1
 k8s.io/api/batch/v2alpha1
 k8s.io/api/certificates/v1beta1
+k8s.io/api/coordination/v1
 k8s.io/api/coordination/v1beta1
 k8s.io/api/policy/v1beta1
 k8s.io/api/events/v1beta1
 k8s.io/api/extensions/v1beta1
 k8s.io/api/networking/v1
+k8s.io/api/networking/v1beta1
+k8s.io/api/node/v1alpha1
+k8s.io/api/node/v1beta1
 k8s.io/api/rbac/v1
 k8s.io/api/rbac/v1alpha1
 k8s.io/api/rbac/v1beta1
+k8s.io/api/scheduling/v1
 k8s.io/api/scheduling/v1alpha1
 k8s.io/api/scheduling/v1beta1
 k8s.io/api/settings/v1alpha1
 k8s.io/api/storage/v1
 k8s.io/api/storage/v1alpha1
 k8s.io/api/storage/v1beta1
-# k8s.io/apimachinery v0.0.0-20190322104434-6d73c65dcf6c
+# k8s.io/apimachinery v0.0.0-20190612205821-1799e75a0719
 k8s.io/apimachinery/pkg/apis/meta/v1
 k8s.io/apimachinery/pkg/api/resource
 k8s.io/apimachinery/pkg/runtime
@@ -221,13 +218,11 @@
 k8s.io/apimachinery/pkg/util/framer
 k8s.io/apimachinery/pkg/util/yaml
 k8s.io/apimachinery/pkg/apis/meta/v1/unstructured
-k8s.io/apimachinery/pkg/apis/meta/v1beta1
-# k8s.io/client-go v10.0.0+incompatible
+# k8s.io/client-go v0.0.0-20190620085101-78d2af792bab
 k8s.io/client-go/kubernetes
 k8s.io/client-go/rest
 k8s.io/client-go/tools/clientcmd
 k8s.io/client-go/discovery
-k8s.io/client-go/kubernetes/typed/admissionregistration/v1alpha1
 k8s.io/client-go/kubernetes/typed/admissionregistration/v1beta1
 k8s.io/client-go/kubernetes/typed/apps/v1
 k8s.io/client-go/kubernetes/typed/apps/v1beta1
@@ -244,15 +239,20 @@
 k8s.io/client-go/kubernetes/typed/batch/v1beta1
 k8s.io/client-go/kubernetes/typed/batch/v2alpha1
 k8s.io/client-go/kubernetes/typed/certificates/v1beta1
+k8s.io/client-go/kubernetes/typed/coordination/v1
 k8s.io/client-go/kubernetes/typed/coordination/v1beta1
 k8s.io/client-go/kubernetes/typed/core/v1
 k8s.io/client-go/kubernetes/typed/events/v1beta1
 k8s.io/client-go/kubernetes/typed/extensions/v1beta1
 k8s.io/client-go/kubernetes/typed/networking/v1
+k8s.io/client-go/kubernetes/typed/networking/v1beta1
+k8s.io/client-go/kubernetes/typed/node/v1alpha1
+k8s.io/client-go/kubernetes/typed/node/v1beta1
 k8s.io/client-go/kubernetes/typed/policy/v1beta1
 k8s.io/client-go/kubernetes/typed/rbac/v1
 k8s.io/client-go/kubernetes/typed/rbac/v1alpha1
 k8s.io/client-go/kubernetes/typed/rbac/v1beta1
+k8s.io/client-go/kubernetes/typed/scheduling/v1
 k8s.io/client-go/kubernetes/typed/scheduling/v1alpha1
 k8s.io/client-go/kubernetes/typed/scheduling/v1beta1
 k8s.io/client-go/kubernetes/typed/settings/v1alpha1
@@ -272,13 +272,15 @@
 k8s.io/client-go/util/homedir
 k8s.io/client-go/kubernetes/scheme
 k8s.io/client-go/tools/reference
-k8s.io/client-go/util/integer
 k8s.io/client-go/pkg/apis/clientauthentication
 k8s.io/client-go/pkg/apis/clientauthentication/v1alpha1
 k8s.io/client-go/pkg/apis/clientauthentication/v1beta1
 k8s.io/client-go/util/connrotation
+k8s.io/client-go/util/keyutil
 k8s.io/client-go/tools/clientcmd/api/v1
-# k8s.io/klog v0.2.0
+# k8s.io/klog v0.3.1
 k8s.io/klog
+# k8s.io/utils v0.0.0-20190221042446-c2654d5206da
+k8s.io/utils/integer
 # sigs.k8s.io/yaml v1.1.0
 sigs.k8s.io/yaml