Added option --staging-run to mysql-test-run to mark slow, not important tests, to not be run in staging trees
Use MY_MUTEX_INIT_FAST for pool mutex

mysql-test/mysql-test-run.pl:
  Added option --staging-run
  Added information about --parallell=# to help message
mysql-test/suite/federated/federated_server.test:
  Slow test, don't run with --staging-run
mysql-test/suite/maria/t/maria-preload.test:
  Slow test, don't run with --staging-run
mysql-test/suite/rpl/t/rpl_optimize.test:
  Slow test, don't run with --staging-run
mysql-test/suite/rpl/t/rpl_relayrotate.test:
  Slow test, don't run with --staging-run
mysql-test/suite/rpl/t/rpl_row_001.test:
  Slow test, don't run with --staging-run
mysql-test/suite/rpl/t/rpl_row_mysqlbinlog.test:
  Slow test, don't run with --staging-run
mysql-test/suite/rpl/t/rpl_row_sp003.test:
  Slow test, don't run with --staging-run
mysql-test/suite/rpl/t/rpl_start_stop_slave.test:
  Slow test, don't run with --staging-run
mysql-test/t/compress.test:
  Slow test, don't run with --staging-run
mysql-test/t/count_distinct3.test:
  Slow test, don't run with --staging-run
mysql-test/t/index_merge_innodb.test:
  Slow test, don't run with --staging-run
mysql-test/t/information_schema_all_engines.test:
  Slow test, don't run with --staging-run
mysql-test/t/innodb_mysql.test:
  Slow test, don't run with --staging-run
mysql-test/t/pool_of_threads.test:
  Slow test, don't run with --staging-run
mysql-test/t/preload.test:
  Slow test, don't run with --staging-run
mysql-test/t/ssl.test:
  Slow test, don't run with --staging-run
mysql-test/t/ssl_compress.test:
  Slow test, don't run with --staging-run
mysql-test/valgrind.supp:
  Suppress warnings from SuSE 11.1 on x86
sql/scheduler.cc:
  Use MY_MUTEX_INIT_FAST for pool mutex