Add support for puppetlabs-mysql 2.2

Puppetlabs-mysql has been rewritten to be much
cleaner. This patch adds a new parameter for the
neutron mysql and init classes allowing users to
use the new version. Previous behavior will continue
as normal when using the old version (0.9)

Change-Id: Id4ca8f25cffc4c76b90ab2b7d7adf2a80b2c2c4b