[VOL-5129] - Create beta-release branch for voltha-protos

VERSION
-------
  o Bump version string for release.

.gitreview
----------
  o Assign default branch for commits != branch=master.

Change-Id: I461306688306cf2a5537ea7c21821c6156cce4d1
diff --git a/.gitreview b/.gitreview
index 07b3894..81f6fe5 100755
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-protos.git
 defaultremote=origin
+defaultbranch=voltha-2.12
diff --git a/VERSION b/VERSION
index fdb5fa4..ee9662e 100755
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.4.9
+5.4.10