Use root user when configuring Galera LXC profile
Use root user when configuring Galera LXC profile

Fix Galera play to match the rest of the OSA container plays which explicitly
run as root user.

Change-Id: I3b97b9a64ce19bda63878eeede205da0d26ec102

major/openstack-ansible,major/os-ansible-deployment,robb-romans/openstack-ansible,major/os-ansible-deployment,openstack/openstack-ansible,weezer/openstack-ansible,bunchc/openstack-ansible,mrda/openstack-ansible,stackforge/os-ansible-deployment,yanyao/openstack-ansible,BjoernT/openstack-ansible,mancdaz/openstack-ansible,mancdaz/openstack-ansible,cloudnull/os-ansible-deployment,mrda/openstack-ansible,os-cloud/os-ansible-deployment,os-cloud/os-ansible-deployment,mrda/openstack-ansible,major/openstack-ansible,Logan2211/openstack-ansible,BjoernT/os-ansible-deployment,bunchc/openstack-ansible,cloudnull/os-ansible-deployment,openstack/openstack-ansible,yanyao/newton,robb-romans/openstack-ansible,yanyao/openstack-ansible,stackforge/os-ansible-deployment,weezer/openstack-ansible,cfarquhar/openstack-ansible,cfarquhar/openstack-ansible,yanyao/newton,Logan2211/openstack-ansible,BjoernT/os-ansible-deployment,BjoernT/openstack-ansible,BjoernT/os-ansible-deployment