move internal mgmapi functions into it.

should also fix AIX build problem.


ndb/include/mgmapi/mgmapi.h:
  Move ndb_mgm_convert_to_transporter to mgmapi_internal.h
  
  Should fix AIX build problem
ndb/include/mgmapi/mgmapi_debug.h:
  Move ndb_mgm_(get|set)_connection_int_parameter to mgmapi_internal.h
ndb/src/common/transporter/Makefile.am:
  Add ndb/src/mgmapi to include for common/transporter (TransporterRegistry requires the use of mgmapi_internal.h)
ndb/src/common/transporter/TransporterRegistry.cpp:
  Use mgmapi_internal.h
ndb/src/mgmapi/mgmapi.cpp:
  some functions defined in mgmapi_internal.h
ndb/src/ndbapi/ndb_cluster_connection.cpp:
  use functions from mgmapi_internal.h