Updated test to use new include function
wait_for_slave_running_off.inc:
  Created new include to resolve the timing issue recorded by Bug#30209
rpl_events.inc:
  The issue shown in Bug#30128 is that 'from er' shows up in a part of the test that it should not show up in. This event really is not created until later in the test, yet since the test runs row and then turns around and runs statement, I am guessing that the first run may not have cleaned up like it should, so I am adding a sync with master after the drop of table t1 to ensure that both master and slave are clean.