Fixed problem with not freed thr_alarm() on slave connect


mysql-test/t/rpl_alter.test:
  Changed name of created test database
sql/ha_innobase.cc:
  Changed innobase_flush_log_at_trx_commit to be 1 as default
sql/mini_client.cc:
  Fixed problem with not freed thr_alarm()
sql/mysqld.cc:
  Allocate some extra thr_alarm slots just to be safe
sql/slave.cc:
  Simple code cleanup