BUG#4775 "Duplicate key requires rollback of transaction" - Improved error message telling that transaction is aborted
BUG#4312 "wrong behaviour on insert .. on duplicate key" functionality disabled


mysql-test/r/ndb_insert.result:
  New tests for fduplicate inserts in combination with transaction
  New tests for INSERT IGNORE and REPLACE
mysql-test/t/ndb_insert.test:
  New tests for fduplicate inserts in combination with transaction
  New tests for INSERT IGNORE and REPLACE
ndb/src/ndbapi/NdbConnection.cpp:
  Return error 4350 "Transaction already aborted" if execute(Commit) is called when theCommitStatus==Aborted
  Add DBUG_PRINT's
ndb/src/ndbapi/ndberror.c:
  Add new error message indicating that the transaction already has been aborted.
sql/ha_ndbcluster.cc:
  Map all error code 0 to 1 in order to catch errors caused by NdbApi returning -1 without having set an error code.
  Use ndb object in THD in get_error_message
  BUG# 4312 Return HA_ERR_WRONG_COMMAND if extra(HA_EXTRA_IGNORE_DUP_KEY) is called
  Only use writeTuple if command is REPLACE
sql/ha_ndbcluster.h:
  Added member variable to keep track of when HA_EXTRA_IGNORE_DUP_KEY is used, but NDB can't support it.