mysql-test/mysql-test-run.pl:
  Use same location for slave-load-tmpdir in all versions
mysql-test/mysql-test-run.sh:
  Use same location for slave-load-tmpdir in all versions
mysql-test/r/rpl_loaddata.result:
  Update result after changing slave-load-tmpdir to use a shorter path
mysql-test/r/rpl_loaddatalocal.result:
  Update result after changing slave-load-tmpdir to use a shorter path
mysql-test/r/rpl_log.result:
  Update result after changing slave-load-tmpdir to use a shorter path
mysql-test/t/rpl_loaddatalocal.test:
  Use MYSQLTEST_VARDIR when specifying path to load from(backport from 5.0)
  Use new command "remove_file" instead of s"ystem rm"