merge with the develop branch (stage 1)

.gitlab-ci.yml

cmake_targets/CMakeLists.txt

cmake_targets/autotests/README.txt

cmake_targets/autotests/run_exec_lte-softmodem_tests.py

cmake_targets/autotests/test_case_list.xml

cmake_targets/autotests/tools/git-retry.sh

cmake_targets/autotests/tools/iperf_script

cmake_targets/autotests/tools/run_gdb

cmake_targets/build_oai

cmake_targets/tools/build_helper

cmake_targets/tools/run_enb_ue_virt_s1

common/utils/T/.gitignore

common/utils/T/T_messages.txt

common/utils/T/tracer/Makefile

common/utils/T/tracer/event_selector.c

common/utils/T/tracer/gui/gui.h

common/utils/T/tracer/gui/textlist.c

common/utils/T/tracer/macpdu2wireshark.c

common/utils/T/tracer/packet-mac-lte.h

common/utils/T/tracer/view/textlist.c