There are two types of assertion failures in test.
  1)In the test some operation is performed on master and
 on slave assertion is made whether the master_log_name
 and master_log_pos have got updated in mysql.slave_relay_log_info.
 The assertion is failng with the result that the master_log_file
 and position have not got synced since before the assertion is
 made the test doesn't guarantee whether the slave has synced it's
 IO_THREAD with the master.

  2) some times there is assertion failure in gtid_step_assert.inc.
 This file checks that n number of gtid's have been added since
 last call to gtid_executed was made. This assertion is failing
 since before the assertion is made the test doesn't guaratee
 whether the slave's IO_THREAD is in sync with the master.

 Fix: Replaced assert.inc with wait_condition.inc.
     Added sync_slave_io_with_master wherever necessary.