Zentyal MySql configuration file can be now be set from a template
If there are no innodb param change, do not restart mysql daemon
Removed enableInnoDbIfNeeded
Check mysql conf file integrity at the initial-setup script

 * So we make sure it is not got overwritten
Added comments
Updated changelog
If the database has already enabled the innoDB engine, we won't disable it
better constant name
simplified system command
move updateMySQL to logs, to avoid do it on every initial-setup
Make sure the MySQL conf file is correct before configure webmail
updated core changelog to last changes
safer way to restart mysql

and some single-quoting :P
Fixed wrong use
Merge pull request #1140 from Zentyal/mjulian/mysql-conf-template

Mjulian/mysql conf template