handled mixed tcp/shm transporters
+ bug#7124


ndb/src/common/transporter/SHM_Transporter.cpp:
  Add remote/own pid for signaling availability of data on shm-segment
ndb/src/common/transporter/SHM_Transporter.hpp:
  Add remote/own pid for signaling availability of data on shm-segment
ndb/src/common/transporter/TransporterRegistry.cpp:
  Add remote/own pid for signaling availability of data on shm-segment
ndb/src/kernel/main.cpp:
  Set pid to use for shm-signaling
ndb/src/mgmsrv/ConfigInfo.cpp:
  bug#7124
ndb/src/ndbapi/TransporterFacade.cpp:
  Set pid to use for shm-signaling