[VOL-5054] - Triage build for voltha-openolt-adapter

VERSION
cmd/openolt-adapter/main.go
cmd/openolt-adapter/main_test.go
internal/pkg/olterrors/common.go
--------------------------------
  o Cosmetic edits to force a build.
  o Run gofmt -s -w to correct a few syntax problems that failed the job earlier.

Change-Id: I3b525489be01b4e968d163b8835534d683bf1722
diff --git a/VERSION b/VERSION
index bbdf097..e8fc584 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.3.5
\ No newline at end of file
+4.3.5.1-dev