The tests were getting timeout specially on windows due to many
show_binlog_events.inc involved in the tests. All these tests will finally
call rpl_mixing_engines.test which sources rpl_mixing_engines.inc file where
the main operations are done and the File show_binlog_events.inc is called.

 Fix: Replaced the File show_binlog_events.inc with the query show binlog events
with some column masking and the regex replacements needed for the tests result
file to be same.
 Removed the include file big_test.inc from the rplmixing_engines tests as these
tests are taking less time after the fix.