dont assume that page is "all empty"
  only as gci is acked, as release_gci might not have processed it yet


storage/ndb/src/kernel/blocks/ERROR_codes.txt:
  new error codes
storage/ndb/src/kernel/blocks/suma/Suma.cpp:
  dont assume that page is "all empty"
  only as gci is acked, as release_gci might not have processed it yet
storage/ndb/test/ndbapi/test_event.cpp:
  testcase
storage/ndb/test/run-test/daily-basic-tests.txt:
  testcase