post release tag & branch activity

VERSION
.gitreview
==========
  o Increment VERSION to 3.6.0-dev to avoid conflicts with release branch.
  o Change defaultbranch=master, target branch for rebase and merge.

Change-Id: I5a35b8f0db5c00eafffdc80d73923fc4155da443
diff --git a/VERSION b/VERSION
index 65afb3b..86bab9c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.5.4
+3.6.0-dev