VOL-5140 - Create release branch for voltha-openonu-adapter-go

VERSION
-------
  o Bump version file for the release branch.

.gitreview
----------
  o Assign defaultbranch=voltha-2.12 for rebase and merge

Change-Id: I1f93d2eb8f43402e88f42236167115818ca0dc6f
diff --git a/.gitreview b/.gitreview
index 6e7dab7..d7ecd39 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-openonu-adapter-go.git
 defaultremote=origin
+defaultbranch=voltha-2.12
diff --git a/VERSION b/VERSION
index 1a285c3..a158d08 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.10.5
+2.10.6