Bump VERSION file to next minor after branch created

Change-Id: I61b91a97b4a4a17cde675e99b3a09cb9510270e7
diff --git a/VERSION b/VERSION
index 66ce77b..f7446a0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-7.0.0
+7.1.0-dev