VOL-5144 - Create beta-release branch for voltctl

VERSION
-------
  o Bump string to major.0-dev post release.

.gitreview
----------
  o Assign defaultbranch=master as a visual cue for branching problems.

Change-Id: Ie989082c2f9e372ba76b60e651207861d654cc70
diff --git a/.gitreview b/.gitreview
index dba8a92..215e8eb 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltctl.git
 defaultremote=origin
+defaultbranch=master