mysql-test/lib/mtr_cases.pl:
  Always set "ndb_test" if tets name contains ndb. 
  Set to skipped if "--skip-ndbcluster"
mysql-test/lib/mtr_report.pl:
  Print special error message for ndb_test that are failed due to failure to start or install ndbcluster
mysql-test/mysql-test-run.pl:
  Remove mtr_error call from ndbcluster_install, instead check after ndbcluster_install if test run should continue or if it should be aborted
  Faile ndb test and print special error message if it's a ndb test and flag_ndb_status_ok is not ok