[t:3988] #3988 Add cleaner_executions to handlerton display of engine status.  Deleted maybe_get_and_pin_if_in_memorys from header.  Improved engine status display on crash.

git-svn-id: file:///svn/mysql/tokudb-engine/tokudb-engine@37054 c7de825b-a66e-492c-adef-691d508d4ae1