Releasing 1.9.1 for VOLTHA-2.9 and updating voltha-protos to 5.1.2

Change-Id: I67698ff9c580315bf56e8d192ed11a44c8685ff8
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 056b658..1b25546 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -79,9 +79,9 @@
 # github.com/opencord/omci-lib-go/v2 v2.1.2
 github.com/opencord/omci-lib-go/v2
 github.com/opencord/omci-lib-go/v2/generated
-# github.com/opencord/voltha-protos/v5 v5.0.0
-github.com/opencord/voltha-protos/v5/go/common
+# github.com/opencord/voltha-protos/v5 v5.1.2
 github.com/opencord/voltha-protos/v5/go/ext/config
+github.com/opencord/voltha-protos/v5/go/extension
 github.com/opencord/voltha-protos/v5/go/openolt
 github.com/opencord/voltha-protos/v5/go/tech_profile
 # github.com/pierrec/lz4 v2.4.1+incompatible
@@ -117,12 +117,12 @@
 golang.org/x/text/transform
 golang.org/x/text/unicode/bidi
 golang.org/x/text/unicode/norm
-# google.golang.org/genproto v0.0.0-20210924002016-3dee208752a0
+# google.golang.org/genproto v0.0.0-20211207154714-918901c715cf
 google.golang.org/genproto/googleapis/api/annotations
 google.golang.org/genproto/googleapis/api/httpbody
 google.golang.org/genproto/googleapis/rpc/status
 google.golang.org/genproto/protobuf/field_mask
-# google.golang.org/grpc v1.41.0 => google.golang.org/grpc v1.25.1
+# google.golang.org/grpc v1.42.0 => google.golang.org/grpc v1.25.1
 google.golang.org/grpc
 google.golang.org/grpc/backoff
 google.golang.org/grpc/balancer