Added --log-slave-updates because test requires it. 
The events based on LOAD DATA INFILE masked by --replace_regex instead restarting of slave.
Added waiting start and stop of slave after START|STOP SLAVE statements.


mysql-test/r/rpl_log.result:
  updated result file
mysql-test/t/disabled.def:
  updated disabled.def
mysql-test/t/rpl_log-slave.opt:
  updated option for slave
mysql-test/t/rpl_log.test:
  updated test