Updated MySQL server to use InnoDB
Updated MySQL server to use InnoDB

I updated the MySQL server configuration section to use the InnoDB
storage engine by default. This key has no impact on MySQL 5.5 which
already uses InnoDB by default.

Change-Id: I5a0d60e8e38488861ec53b9032cfc764accc3dbf
Closes-Bug: #1299480

potsmaster/openstack-manuals,kairoaraujo/openstack-manuals,potsmaster/openstack-manuals,gongysh2004/openstack-manual,saeki-masaki/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,gongysh2004/openstack-manual,saeki-masaki/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals