Starting 2.7.0-dev version

Change-Id: Ie488e44cc281a9f6eeee5f44f7eb2bb250e1c8d9
diff --git a/VERSION b/VERSION
index 69fa968..6886b8a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.0-dev
+2.7.0-dev