Version 1.6 support branch for VOLTHA

Change-Id: I6211fa5d693dde3758812a9ab61eec1585aef175
diff --git a/default.xml b/default.xml
index 9b71ac9..ab86d77 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-1.6" />
+  <default revision="voltha-1.6"
            remote="opencord"
            sync-j="4" />