handle error in TCKEYREQ during TCINDXREQ better


ndb/src/kernel/blocks/ERROR_codes.txt:
  new error code
ndb/src/kernel/blocks/dbtc/Dbtc.hpp:
  Add 3 values to isIndexOp
ndb/src/kernel/blocks/dbtc/DbtcMain.cpp:
  handle error in TCKEYREQ during TCINDXREQ
ndb/test/ndbapi/testIndex.cpp:
  Add testcase
ndb/test/run-test/daily-basic-tests.txt:
  Add testcase