Migrated release script to use Buck exclusively.

Change-Id: I04371594b68071488788c4ecbdb896a6306a2a14
diff --git a/tools/build/onos-package-test b/tools/build/onos-package-test
index 94d153d..1e23786 100755
--- a/tools/build/onos-package-test
+++ b/tools/build/onos-package-test
@@ -3,6 +3,9 @@
 # Packages ONOS test facilities into onos-test.tar.gz
 # -----------------------------------------------------------------------------
 
+echo "Use 'onos-buck build //:onos-test' instead"
+exit 1
+
 set -e
 
 [ ! -d "$ONOS_ROOT" ] && echo "ONOS_ROOT is not defined" >&2 && exit 1