The mariadb container launches two threads in addition to the mysql
daemon, one to mantain a configmap containing the Galera Cluster state,
and the other to handle leader elections. These threads die if they
suffer any exceptions talking to the kubernetes apiserver. This can
happen sometimes, e.g. when a k8s control node reboots.
This change logs and ignores the kubernetes.client.rest.ApiException,
allowing the threads to retry and hopefully succeed once the k8s api
becomes available.
Change-Id: I5745a763bb07f719d83a41c1f27be2b76ce998e9
b482b57e6e