added fix for keeping "records" up to date when execute() fails


mysql-test/r/ndb_insert.result:
  Added testcase for select count() during transaction with failures
mysql-test/t/ndb_insert.test:
  Added testcase for select count() during transaction with failures
sql/ha_ndbcluster.cc:
  added fix for keeping "records" up to date when execute() fails
sql/ha_ndbcluster.h:
  added fix for keeping "records" up to date when execute() fails