Hikari cp 12 30

Hey Lily,

Please try this branch to see if it works.

Modify the following part in portal-ext, from

````
jdbc.default.liferay.pool.provider=tomcat
jdbc.default.maxActive=75
jdbc.default.minIdle=10
jdbc.default.jmxEnabled=false
jdbc.default.fairQueue=false
jdbc.default.timeBetweenEvictionRunsMillis=0
````

to

````
jdbc.default.liferay.pool.provider=hikaricp
jdbc.default.connectionTimeout=30000
jdbc.default.idleTimeout=600000
jdbc.default.maxLifetime=1800000
jdbc.default.minimumIdle=10
jdbc.default.maximumPoolSize=75
jdbc.default.registerMbeans=false
````

and try to run comparison on MB, Blog and DL in both main env and qa env.