Rework/Refactor XMLWorkflow migration so that it works properly with Flyway and can be enabled via a configuration flag. Also replace DatabaseManger.loadSql() with DatabaseUtils.executeSql() as ALL SQL should be run via Flyway parser now.
Merge pull request #724 from tdonohue/DS-2243

DS-2243: Rework/Refactor XMLWorkflow migration so that it works properly with Flyway