mysql-test/r/ndb_blob.result:
  bug#19956 : var* pk
mysql-test/t/ndb_blob.test:
  bug#19956 : var* pk
ndb/src/ndbapi/NdbDictionaryImpl.hpp:
  bug#19956 - check var* length bytes and zero rest of value if any blob attribute
ndb/src/ndbapi/NdbOperationSearch.cpp:
  bug#19956 - check var* length bytes and zero rest of value if any blob attribute