Deletion strategy doesn't need to be started
Deletion strategy doesn't need to be started

I think that calling `DatabaseCleaner.start` there opened a transaction
because the strategy was set to transaction. But then that transaction
was never closed because there was no matching `clean` called with the
transaction strategy - the "matching" clean was called with the deletion
strategy.

crawfoal/greensteps,crawfoal/greensteps,crawfoal/greensteps