Affected tests fixing. After the fix for st_relay_log_info::wait_for_pos() that
handles widely used select('master-bin.xxxx',pos) invoked by mysqltest
there appeared to be four tests that either tried synchronizing when
the slave was stopped or used incorrect synchronization method like
to call `sync_with_master' from the current connection being to the
master itself.

Fixed with correcting the current connection or/and using the correct
synchronization macro when possible.


mysql-test/r/rpl_loaddata.result:
  results changed
mysql-test/r/rpl_slave_status.result:
  results changed
mysql-test/t/rpl_loaddata.test:
  fixing cleanup for two tests
mysql-test/t/rpl_skip_error.test:
  fixing cleanup for two tests
mysql-test/t/rpl_slave_status.test:
  fixing cleanup
mysql-test/t/rpl_temporary.test:
  fixing synchronizations to use the intended correct macro.