Make packstack compatible with latest puppetlabs-mysql module

Update of mysql module allows us to update all openstack puppet modules
to their latest versions. This will allow us to test and deploy Juno
release.

Requires: https://github.com/redhat-openstack/openstack-puppet-modules/pull/96
Requires: rhbz#1134328
Closes-Bug: rhbz#1129760
Change-Id: I155b9fbf258d12a64d7b6e2be3f623b709b7289e
Merge "Make packstack compatible with latest puppetlabs-mysql module"