With the fix for
Bug #18082045	 TESTFK CREATEDROPWITHDATA NEED HIGH MAXNOOFCONCURRENTSCANS AND MAXNOOFLOCALSCANS

the higher MaxNoOfConcurrentScans are no longer needed for testFK -n CreateDropWithData introduced in

revision-id: mauritz.sundell@oracle.com-20140110163326-48yzitisfij7y26m
message:
  ndb - test: testFK -n CreateDropWithData T1 needs higher MaxNoOfConcurrentScans
  
  Raising to MaxNoOfConcurrentScans = 300.
  Experiments gave that ~257 is needed.