Bumping version after 2.7 release

Change-Id: I3a1a5fa1000c57a89dff211792e0a3f8c53f3c4a
diff --git a/VERSION b/VERSION
index 1c99cf0..59b9db0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.4.4
+1.5.0-dev