new behaviour is as follows:
1) node is refused to start, and should fail with message in error log that it must be restarted --initial
2) if cluster failure in this situation, node must also be restarted --intial
   if not SR will fail, with this message


storage/ndb/src/kernel/blocks/dbdih/DbdihMain.cpp:
  Prevent node from starting _at all_ if it has performed more than 6 failed
    node restart.
storage/ndb/test/ndbapi/testNodeRestart.cpp:
  test prg 25984
storage/ndb/test/run-test/daily-basic-tests.txt:
  testcase