Don't try and create the my.cnf.d dir everytime
Don't try and create the my.cnf.d dir everytime

The creation of /etc/my.cnf.d is not idempotent and is run anytime the
mysql client profile is included. This change adds an unless parameter
to ensure it is only run if not used.

Change-Id: I4a30eaccf72f5687dc22ba93c19136e55d36dcab
Closes-Bug: #1680570

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo