refs #5351 fix a mysql test failure caused by non-shared read locks. turns out the real error is that we do not consistently return ER_LOCK_WAIT_TIMEOUT on cursor errors, so mysql-tests can be very fragile.


git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@50139 c7de825b-a66e-492c-adef-691d508d4ae1