Clean up various percona roles.

Individual commits have details about the clean ups
Failed CI:
```
TASK: [percona-server | adjust various other lines in replication.cnf] ******** 
Thursday 06 November 2014  12:04:17 -0800 (0:00:00.244)       0:11:01.119 ***** 
fatal: [173.247.105.6] => A variable inserted a new parameter into the module args. Be sure to quote variables if they contain equal signs (for example: "{{var}}").
```