update license for OMG

openair2/UTIL/OMG/TraCIConstants.h

openair2/UTIL/OMG/client_traci_OMG.c

openair2/UTIL/OMG/client_traci_OMG.h

openair2/UTIL/OMG/common.c

openair2/UTIL/OMG/defs.h

openair2/UTIL/OMG/grid.c

openair2/UTIL/OMG/grid.h

openair2/UTIL/OMG/id_manager.c

openair2/UTIL/OMG/id_manager.h

openair2/UTIL/OMG/job.c

openair2/UTIL/OMG/mobility_parser.c

openair2/UTIL/OMG/mobility_parser.h

openair2/UTIL/OMG/omg.c

openair2/UTIL/OMG/omg.h

openair2/UTIL/OMG/omg_constants.h

openair2/UTIL/OMG/omg_hashtable.c

openair2/UTIL/OMG/omg_hashtable.h

openair2/UTIL/OMG/omg_vars.h

openair2/UTIL/OMG/rwalk.c

openair2/UTIL/OMG/rwalk.h