- Added functionality to check errors returned from mysql_next_result
 - Exit from mysqltest when and unexpected error occurs.
 - The above fixes reveal problems with rpl000009, sp-error and query_cache-
 - Fix sp-error by adding an expected error
 - Fix rpl000009 by not sending "ok" from mysql_create_db when called with silent flag from load_master_data
 - Fix query_cache in separate patch