add abort to multi op test case


ndb/include/ndbapi/NdbConnection.hpp:
  Add aborts to test case
ndb/test/include/HugoOperations.hpp:
  Add aborts to test case
ndb/test/ndbapi/testOperations.cpp:
  Add aborts to test case
ndb/test/src/HugoOperations.cpp:
  Add aborts to test case
ndb/test/src/HugoTransactions.cpp:
  Add aborts to test case