[VOL-5222] - Upgrade golang version for VOLTHA jobs

.gitreview
VERSION
----------
  o post-release tasks.  Repository tagged and banched.
  o Add missing newlines at EOF.
  o go.mod syntax does not allow *-dev suffix so update
    master VERSION from v5.5.0-dev to v5.5.0.  Community
    can introduce a dev version when needed.

go/*.pb.og
vendor/*.go
-----------
  o invoke make mod-update to regenerate go.sum and friends.
  o lint clenaups: find . -name '*.go' -print | xargs -n1 gofmt -s -e -w

Change-Id: I3da80c0ce5600679b388e309bfa4702f1ec3212b
diff --git a/vendor/google.golang.org/grpc/resolver/resolver.go b/vendor/google.golang.org/grpc/resolver/resolver.go
index e28b680..e73a00d 100644
--- a/vendor/google.golang.org/grpc/resolver/resolver.go
+++ b/vendor/google.golang.org/grpc/resolver/resolver.go
@@ -95,7 +95,7 @@
 
 // Address represents a server the client connects to.
 //
-// Experimental
+// # Experimental
 //
 // Notice: This type is EXPERIMENTAL and may be changed or removed in a
 // later release.
@@ -230,12 +230,12 @@
 //
 // Examples:
 //
-// - "dns://some_authority/foo.bar"
-//   Target{Scheme: "dns", Authority: "some_authority", Endpoint: "foo.bar"}
-// - "foo.bar"
-//   Target{Scheme: resolver.GetDefaultScheme(), Endpoint: "foo.bar"}
-// - "unknown_scheme://authority/endpoint"
-//   Target{Scheme: resolver.GetDefaultScheme(), Endpoint: "unknown_scheme://authority/endpoint"}
+//   - "dns://some_authority/foo.bar"
+//     Target{Scheme: "dns", Authority: "some_authority", Endpoint: "foo.bar"}
+//   - "foo.bar"
+//     Target{Scheme: resolver.GetDefaultScheme(), Endpoint: "foo.bar"}
+//   - "unknown_scheme://authority/endpoint"
+//     Target{Scheme: resolver.GetDefaultScheme(), Endpoint: "unknown_scheme://authority/endpoint"}
 type Target struct {
 	// Deprecated: use URL.Scheme instead.
 	Scheme string