ONOS 2.2 requires Bazel 27

Change-Id: I48bd8c24e5eb32a9973667141ee856a016ef23bb
diff --git a/jjb/onos/install-bazel.sh b/jjb/onos/install-bazel.sh
index 7f9b727..f28fbba 100644
--- a/jjb/onos/install-bazel.sh
+++ b/jjb/onos/install-bazel.sh
@@ -7,7 +7,7 @@
 then
     BAZEL_VERSION="0.19.2"
 else
-    if [ ${GERRIT_BRANCH} == "master" ]; then
+    if [ ${GERRIT_BRANCH} == "master" || ${GERRIT_BRANCH} == "2.2.0" ]; then
         BAZEL_VERSION="0.27.0"
     else
         BAZEL_VERSION="0.24.1"