Revert "Removes wildcard entry for mysql permissions"

This reverts commit f445eaa0a4d37029f69fe5cbe124f748e3823249

See discussion in Bug: #1252267 for the reason why to revert this: The way we configure in the guide, we need to have access via the FQDN.
Merge "Revert "Removes wildcard entry for mysql permissions"" into stable/havana