default required for pas_sql_db_host and opsman_sql_db_host

[vchrisb]

There was a change in the google api requiring a value for host do be able to delete a database user.
Setting host = % does allow access from any host.
Without setting host to any value does the delete operation fail with: googleapi: Error 400: Missing parameter: host., required
pas_sql_db_host and opsman_sql_db_host should default to %