This patch adds /catalog_ha_info page on Statestore to show catalog HA
information. The page contains the following information: Active Node,
Standby Node, and Notified Subscribers table. In the Notified
Subscribers table, include the following information items:
-- Id,
-- Address,
-- Registration ID,
-- Subscriber Type,
-- Catalogd Version,
-- Catalogd Address,
-- Last Update Catalogd Time
Change-Id: If85f6a827ae8180d13caac588b92af0511ac35e3
Reviewed-on: http://gerrit.cloudera.org:8080/21418
Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
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