Changed old licenses in FlexRAN agent source files

openair2/ENB_APP/CONTROL_MODULES/MAC/flexran_agent_mac.c

openair2/ENB_APP/CONTROL_MODULES/MAC/flexran_agent_mac.h

...air2/ENB_APP/CONTROL_MODULES/MAC/flexran_agent_mac_defs.h

.../ENB_APP/CONTROL_MODULES/MAC/flexran_agent_mac_internal.c

.../ENB_APP/CONTROL_MODULES/MAC/flexran_agent_mac_internal.h

openair2/ENB_APP/flexran_agent.c

openair2/ENB_APP/flexran_agent.h

openair2/ENB_APP/flexran_agent_async.c

openair2/ENB_APP/flexran_agent_async.h

openair2/ENB_APP/flexran_agent_common.c

openair2/ENB_APP/flexran_agent_common.h

openair2/ENB_APP/flexran_agent_common_internal.c

openair2/ENB_APP/flexran_agent_common_internal.h

openair2/ENB_APP/flexran_agent_defs.h

openair2/ENB_APP/flexran_agent_extern.h

openair2/ENB_APP/flexran_agent_handler.c

openair2/ENB_APP/flexran_agent_net_comm.c

openair2/ENB_APP/flexran_agent_net_comm.h

openair2/ENB_APP/flexran_agent_task_manager.c

openair2/ENB_APP/flexran_agent_task_manager.h