- make sure keys are copied correctly when varchar has 2 length bytes
- test case


mysql-test/r/ndb_basic.result:
  bug#25746 ndb: 4209 error with 2 VARCHAR primary keys
  - test case
mysql-test/t/ndb_basic.test:
  bug#25746 ndb: 4209 error with 2 VARCHAR primary keys
  - test case
sql/ha_ndbcluster.cc:
  bug#25746 ndb: 4209 error with 2 VARCHAR primary keys
  - make sure keys are copied correctly when varchar has 2 length bytes