Add support for puppetlabs-mysql 2.2

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

Change-Id: Icdc787e325f3e86572f6930f1ab8c3d5291e67c9