[VOL-5252] Release repo:voltha-openonu-adaptert-go

VERSION
.gitreview
----------
 o Post release tag & branch patch for branch=master.
 o Bump version string to avoid conflicts:
   - branch=master  (X.{1+Y}.0)
   - branch=release (X.Y.{1+Z})
 o Update .gitreview (defaultpath=master), specify rebase/merge target.

Change-Id: I7ff69f7a082c73ecc0b46539a2ebc4fb96a23b07
diff --git a/VERSION b/VERSION
index 2331c63..2b021ca 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.11.11
+2.12.0-dev