- Add test to see if tests are running with root permissions
 - Disables tests that uses chmod if that is the case


mysql-test/mysql-test-run.pl:
  Add test to check if mysql-test-run is run with root permission. 
  Set environment variable MYSQL_TEST_ROOT to 'YES' or 'NO'.
mysql-test/t/information_schema.test:
  Disable test if running as root
mysql-test/t/rpl_rotate_logs.test:
  Disable test if running as root.
mysql-test/include/not_as_root.inc:
  New BitKeeper file ``mysql-test/include/not_as_root.inc''
mysql-test/r/not_as_root.require:
  New BitKeeper file ``mysql-test/r/not_as_root.require''