Version 2.0 support branch for VOLTHA

Change-Id: I9fc6e3a25da76923a3578a88c7cbc77f21a52710
diff --git a/default.xml b/default.xml
index 465edf6..cca6a22 100644
--- a/default.xml
+++ b/default.xml
@@ -4,8 +4,8 @@
   <remote  name="opencord"
            fetch=".."
            review="https://gerrit.opencord.org/"
-           revision="master" />
-  <default revision="master"
+           revision="voltha-2.0" />
+  <default revision="voltha-2.0"
            remote="opencord"
            sync-j="4" />