Fix path to cacert on /healthz/ready check

playbooks/common/openshift-node/config.yml

@@ -256,7 +256,7 @@
     # Using curl here since the uri module requires python-httplib2 and
     # wait_for port doesn't provide health information.
     command: >
-      curl --silent --cacert {{ openshift.master.config_dir }}/master/ca.crt
+      curl --silent --cacert {{ openshift.common.config_base }}/master/ca.crt
       {{ openshift.master.api_url }}/healthz/ready
     register: api_available_output
     until: api_available_output.stdout == 'ok'