Disable old method of bazel install and reuse bazelisk cache

Change-Id: I59aea1e017e7d2c7f196b3d540c2d918fad0f5a3
diff --git a/jjb/onos/install-bazel.sh b/jjb/onos/install-bazel.sh
index 147b36d..3a75bd1 100644
--- a/jjb/onos/install-bazel.sh
+++ b/jjb/onos/install-bazel.sh
@@ -3,29 +3,7 @@
 # exit on errors
 set -eu -o pipefail
 
-BAZEL_VERSION="none"
-if [ ${GERRIT_BRANCH} == "onos-1.14" ]; then
-    BAZEL_VERSION="0.19.2"
-fi
-if [ ${GERRIT_BRANCH} == "onos-2.0" -o ${GERRIT_BRANCH} == "onos-2.1" ]; then
-    BAZEL_VERSION="0.24.1"
-fi
-if [ ${GERRIT_BRANCH} == "onos-2.2" -o ${GERRIT_BRANCH} == "onos-2.3" -o ${GERRIT_BRANCH} == "onos-1.15" ]; then
-    BAZEL_VERSION="1.0.0"
-fi
-if [ ${GERRIT_BRANCH} == "master" ]; then
-    BAZEL_VERSION="1.2.1"
-fi
-
-
-if [ ${BAZEL_VERSION} != "none" ]
-then
-    echo Installing bazel version ${BAZEL_VERSION}
-    curl -L -o bazel.sh -s https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-installer-linux-x86_64.sh
-    chmod +x bazel.sh
-    ./bazel.sh --user
-else
-    echo Not installing bazel
-fi
+echo Reusing bazelisk cache
+cd ~/.cache &&  ln -s /usr/local/share/bazelisk && cd