Marked TechProfile dataplane TC for ATT as notready

Change-Id: I677db20f470e6c45d23f7f2c7c8ae6d82e2ea081
diff --git a/.gitreview b/.gitreview
index 4e39788..3f9b9b6 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-system-tests.git
 defaultremote=origin
+defaultbranch=voltha-2.8