Bump bazel to 0.22.0

Change-Id: I4884500ed825b80bf3e605934e3ad2387f9eaf97
diff --git a/jenkins-docker/slave-bazel-nocache/Makefile b/jenkins-docker/slave-bazel-nocache/Makefile
index 27c9740..106039f 100644
--- a/jenkins-docker/slave-bazel-nocache/Makefile
+++ b/jenkins-docker/slave-bazel-nocache/Makefile
@@ -1,6 +1,6 @@
 NO_CACHE=false
 IMAGE=gerritforge/gerrit-ci-slave-bazel:debian-jessie-nocache
-BAZEL_VER=0.19.0
+BAZEL_VER=0.22.0
 BUILDIFIER_VER=0.20.0
 
 # Targets