mysql-test/r/rpl_ndb_blob.result:
  test case for varsize PK + blob
mysql-test/t/rpl_ndb_blob.test:
  test case for varsize PK + blob
storage/ndb/include/ndbapi/NdbBlob.hpp:
  table PK in blob part key is fixed-sized so keep extra bytes zero if varsize PK
storage/ndb/src/ndbapi/NdbBlob.cpp:
  table PK in blob part key is fixed-sized so keep extra bytes zero if varsize PK