Merge 'replication_applier_status_by_coordinator' table.

This table captures SQL_THREAD status in case of both single threaded and
multi threaded slave configuration. When multi_source replication is enabled
this table will display each source specific SQL_THREAD status.

Replaced following columns:
  - CHANNEL_NAME with CONNECTION_NAME
Added new columns for:
 - LAST_SEEN_TRANSACTION
 - LAST_TRANS_RETRY_COUNT