fix make test

Fix 2 failing tests

 * `refresh_my_ring_test` was failing due to an ETS table not being
 * setup properly.
 * `core_vnode_eqc` was failing in multiple places
    * shutdown had to be changed to kill so that processes didn't hang
    * during testing
       * an asyncwork response wasn't being counted for asynccrash calls
       * so that needed to be added back in (it was commented out)
          * With worker pools of 1, if an asyncrash call was followed by
          * another async call that calls work wouldn't be counted
          * because the message was dropped. I changed the possible pool
          * sizes from [0,1,10] to [0,4,10] to make this issue extremely
          * unlikely to happen. You'd need 4 worker crashes then another
          * async call before any of them were restarted. Since they all
          * have 100ms delays before crashing on purpose in mock_vnode
          * that seems highly unlikely.
Merge pull request #504 from basho/bugfix/fix-make-test

fix make test