excluded double call of 'invalidate()'


mysql-test/r/innodb_cache.result:
  test of invalidation
mysql-test/t/innodb_cache.test:
  test of invalidation
sql/handler.cc:
  excluded double call of 'invalidate()'
sql/sql_delete.cc:
  fixed invalidation of query cache
sql/sql_insert.cc:
  fixed invalidation of query cache
sql/sql_update.cc:
  fixed invalidation of query cache