fix for bug#20624  events_logs_tests.test fails randomly


BitKeeper/etc/ignore:
  Added server-tools/instance-manager/net_serv.cc to the ignore list
mysql-test/r/events_logs_tests.result:
  update result
mysql-test/t/events_logs_tests.test:
  fix test. this should remove the problem of 
  Bug #20624  events_logs_tests.test fails randomly