tables during query tables registration. (BUG#15119)


mysql-test/r/view_query_cache.result:
  Tests for temptable views in the query cache.
mysql-test/t/view_query_cache.test:
  Tests for temptable views in the query cache.
sql/sql_cache.cc:
  We should not skip temptable view along with other derived
  tables during query tables registration.