[VOL-2876]

Update grpc-gateway to a version with improved generation of swagger docs
Bump the golang and alpine image patch versions

Change-Id: Id8c772dd782b29586615d585a4cf6c756da0098c
diff --git a/VERSION b/VERSION
index 7ec1d6d..ccbccc3 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.0
+2.2.0