Upgrade bazel to version 0.23 for master, 2.0, and 1.15 branches

Change-Id: I62a21252b8d4aad9b1ed44f59bb36c979e8a799f
diff --git a/jjb/onos/install-bazel.sh b/jjb/onos/install-bazel.sh
index 0afbcd8..679dd99 100644
--- a/jjb/onos/install-bazel.sh
+++ b/jjb/onos/install-bazel.sh
@@ -3,11 +3,11 @@
 # exit on errors
 set -eu -o pipefail
 
-if [ ${GERRIT_BRANCH} == "master" ]
+if [ ${GERRIT_BRANCH} == "onos-1.14" ]
 then
-    BAZEL_VERSION="0.23.0"
-else
     BAZEL_VERSION="0.19.2"
+else
+    BAZEL_VERSION="0.23.0"
 fi
 
 if [ ${BAZEL_VERSION} != "none" ]