- add some sanity check to marker/hash code to see that element isnt inserted twice into hashtable
    (if defined VM_TRACE or ERROR_INSERT)

  - allow REMOVE_MARKER_ORD to fail(dont find record) in release


storage/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp:
  add a bunch of sanity check ifdef#vmtrace of #error_insert
storage/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp:
  add a bunch of sanity check ifdef#vmtrace of #error_insert