Adding onos instances and masters command

Change-Id: I4ca3674dc56ea2d4475efbbcefb8f4d0674a27e2
diff --git a/VERSION b/VERSION
index 04b10b4..ebf14b4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.7
+2.1.8