dev/core#234 Move all steps from 5.3.alpha1.mysql.tpl to 5.3.0.mysql.tpl due to upgrade issues

[seamuslee001]

Overview

In case that sites have already upgraded to the beta version ensure that Monmouthshire is added to the database

ping @eileenmcnaughton @totten

[civibot]

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[eileenmcnaughton]

My brain is melting - I'll let @totten decide if we need this as well as your other change

[totten]

Tested/spot-checked a few upgrade paths (5.2.2=>5.3.0, 4.6.0=>5.3.0) locally using the same changes. They worked as expected. Expediting merge because we have a tight-clock on republishing 5.3.0.