when resetting replication tests.  If not, circular replication setups
will leave cruft in the slaves binary log.

mysql-test/include/master-slave-reset.inc:
  Adding RESET MASTER on slave and RESET SLAVE on master. In order to avoid
  having to re-generate all the replication test result files, I disable the
  query log for the added statements.
mysql-test/suite/rpl/t/rpl_flushlog_loop.test:
  Adding code to clean up after test. Disabling query log for the cleanup code.