testcase only
  new pseudo column NDB$COPY_ROWID


storage/ndb/include/kernel/AttributeHeader.hpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/include/ndbapi/NdbDictionary.hpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/src/kernel/blocks/dbtup/DbtupRoutines.cpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/src/ndbapi/NdbDictionaryImpl.cpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/src/ndbapi/ndb_cluster_connection.cpp:
  Add new pseudo column for reading location of copy tuple
storage/ndb/test/ndbapi/testBasic.cpp:
  add testcase for bug#27756