Explicitly cap timeout for index disable RPC on compaction

In PHOENIX-3953 we're marking the mutable global index as disabled with an index_disable_timestamp of 0 from the compaction hook.This is a potentially a server-server RPC, and HConnectionManager#setServerSideHConnectionRetries makes it such that the HBase client config on the server side has 10 times the number of retries, lasting hours.
To avoid a hung coprocessor hook, we should explicitly cap the number of retries here.