Post release increment to version 2.1.1-dev

Change-Id: Ic19bdb079ef5e6775ee470f64ba0f05cf0dea80d
diff --git a/VERSION b/VERSION
index 7ec1d6d..7c7e096 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.0
+2.1.1-dev