Merge tag '2017.w20' into UE_logging

cmake_targets/build_oai

cmake_targets/tools/run_enb_ue_virt_noS1

cmake_targets/tools/run_enb_ue_virt_s1

common/utils/T/T_messages.txt

openair1/PHY/INIT/lte_init.c

openair1/PHY/LTE_TRANSPORT/dci.c

openair1/PHY/LTE_TRANSPORT/dci_tools.c

openair1/PHY/LTE_TRANSPORT/defs.h

openair1/PHY/LTE_TRANSPORT/if4_tools.c

openair1/PHY/LTE_TRANSPORT/phich.c

openair1/PHY/LTE_TRANSPORT/proto.h

openair1/PHY/LTE_TRANSPORT/pucch.c

openair1/PHY/TOOLS/lte_dfts.c

openair1/PHY/TOOLS/lte_phy_scope_tm4.c

openair1/PHY/impl_defs_lte.h

openair1/SCHED/phy_procedures_lte_common.c

openair1/SCHED/phy_procedures_lte_eNb.c

openair1/SCHED/phy_procedures_lte_ue.c

openair1/SIMULATION/LTE_PHY/pucchsim.c

openair1/SIMULATION/TOOLS/random_channel.c