remove the OMG SUMO related files and update te top-level OMG and cmakefiles

cmake_targets/CMakeLists.txt

openair2/UTIL/OMG/SUMO/README.TXT

openair2/UTIL/OMG/SUMO/SCENARIOS/scen.sumo.cfg

openair2/UTIL/OMG/SUMO/SCENARIOS/sumo_commands.txt

openair2/UTIL/OMG/SUMO/SCENARIOS/traci.scen.sumo.cfg

openair2/UTIL/OMG/SUMO/SCENARIOS/traci_ex_Map.net.xml

openair2/UTIL/OMG/SUMO/SCENARIOS/traci_ex_ROU.rou.xml

openair2/UTIL/OMG/TraCIConstants.h

openair2/UTIL/OMG/client_traci_OMG.c

openair2/UTIL/OMG/client_traci_OMG.h

openair2/UTIL/OMG/id_manager.c

openair2/UTIL/OMG/id_manager.h

openair2/UTIL/OMG/omg.c

openair2/UTIL/OMG/socket_traci_OMG.c

openair2/UTIL/OMG/socket_traci_OMG.h

openair2/UTIL/OMG/storage_traci_OMG.c

openair2/UTIL/OMG/storage_traci_OMG.h

openair2/UTIL/OMG/sumo.c

openair2/UTIL/OMG/sumo.h