- Update record file of the tablespace_datafiles test to include
  test case for Bug #26187744:  TABLESPACE IS NOT DROPPED PROPERLY
  WHEN ADD DATAFILE FAILS. The bug has been fixed up-stream
- Update the ndb_dd_ddl test to expect new error with a more
  appropriate message when 'drop datafile' fails
- Enable tablespace_datafiles and ndb_dd_ddl tests