Fix mysql installation on openSUSE

Use os-svc-enable and -restart the mysql service to have "map-services"
handle the different service names on different Distros.
Create /var/lib/mysql on openSUSE. Otherwise register-state-path will
not prepare /var/lib/use-ephemeral/ correctly for it.
Create a /var/run/mysql/mysql.sock compatibility link to have mysql
clients find the database sockets. This needs to happen in the running
system as /var/run is a tmpfs on openSUSE.

Change-Id: I4086ff08ecd84072a109319ea8f872c75ab7ce45
Merge "Fix mysql installation on openSUSE"