mysql-test/r/multi_update.result:
  test with multiupdate reopening tables
mysql-test/t/multi_update.test:
  test with multiupdate reopening tables
sql/item.cc:
  processor for cleunuping items in item tree
sql/item.h:
  processor for cleunuping items in item tree
sql/sql_update.cc:
  fixed case when lock reopened tables
sql/table.cc:
  methos for cleunup view itema of table if they are present
sql/table.h:
  methos for cleunup view itema of table if they are present