merge nfapi_cleanup

cmake_targets/CMakeLists.txt

cmake_targets/build_oai

nfapi/oai_integration/nfapi.c

nfapi/oai_integration/nfapi_pnf.c

nfapi/oai_integration/nfapi_vnf.c

nfapi/oai_integration/vendor_ext.h

openair1/PHY/INIT/lte_init_ue.c

openair1/SCHED/fapi_l1.c

openair1/SCHED/phy_procedures_lte_eNb.c

openair1/SCHED/prach_procedures.c

openair1/SCHED_UE/pusch_pc.c

openair1/SIMULATION/ETH_TRANSPORT/netlink_init.c

openair1/SIMULATION/ETH_TRANSPORT/proto.h

openair1/SIMULATION/LTE_PHY/dlsim.c

openair1/SIMULATION/LTE_PHY/ulsim.c

openair2/ENB_APP/enb_config.c

openair2/LAYER2/MAC/config.c

openair2/LAYER2/MAC/config_ue.c

openair2/LAYER2/MAC/eNB_scheduler.c

openair2/LAYER2/MAC/eNB_scheduler_RA.c