removed references to example2 (asynch api)


ndb/examples/Makefile:
  updated ndbapi examples
ndb/examples/ndbapi_example1/ndbapi_example1.cpp:
  updated ndbapi examples
ndb/examples/ndbapi_example2/Makefile:
  updated ndbapi examples
ndb/examples/ndbapi_example2/ndbapi_example2.cpp:
  updated ndbapi examples
ndb/examples/ndbapi_example3/Makefile:
  updated ndbapi examples
ndb/examples/ndbapi_example3/ndbapi_example3.cpp:
  updated ndbapi examples
ndb/examples/ndbapi_example4/Makefile:
  updated ndbapi examples
ndb/examples/ndbapi_example4/ndbapi_example4.cpp:
  updated ndbapi examples
ndb/examples/ndbapi_example5/Makefile:
  updated ndbapi examples
ndb/examples/ndbapi_example5/ndbapi_example5.cpp:
  updated ndbapi examples
ndb/include/ndbapi/Ndb.hpp:
  removed references to example2 (asynch api)
ndb/include/ndbapi/NdbRecAttr.hpp:
  removed references to example2 (asynch api)