Merge branch 'feature/ping-insert' of https://github.com/hirose31/mha4mysql-manager
If mysqld accepts queries but hangs on updates
(i.e. RAID controller failure), ping_type=insert causes
duplicate advisory lock failure. This patch prevents the
failure by not acquiring an advisory lock when
checking connections.
Formatting (perltidy -i=2)
Fixing test cases
Merge branch 'master' of https://github.com/yoshinorim/mha4mysql-manager