Oozie + MySQL configuration

* oozie-site.xml MySQL configuration
* MySQL starts on oozie node group
* MySQL starts if MySQL is enabled by config
* Oozie DB schema creating in MySQL
* Applying multiple general configs
* Added test for general configs

Implements blueprint edp-oozie-for-vanilla-plugin

Change-Id: I77342be5523f8584a5c6ba0d9fa2794d2702d27d
Merge "Oozie + MySQL configuration"