Nhat Nguyen 73d24203e7 Handle no such remote cluster exception in ccr (#53415)
A remote client can throw a NoSuchRemoteClusterException while fetching
the cluster state from the leader cluster. We also need to handle that
exception when retrying to add a retention lease to the leader shard.

Closes #53225
2020-04-04 13:55:06 -04:00
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