Using ONOS 2.2.7-b4 as base image

Change-Id: I38a5bfa10e0ec926a078be94db903b96e2be1841
diff --git a/VERSION b/VERSION
index 5ca2db7..5480805 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.2.0-dev10
+4.2.0-dev11