merge develop, add example config file

SystemX-tutorial-design.md

ci-scripts/Jenkinsfile-gitlab

ci-scripts/buildOnVM.sh

ci-scripts/conf_files/enb.band13.tm1.50PRB.emtc.conf

ci-scripts/main.py

ci-scripts/oai-ci-vm-tool

ci-scripts/runTestOnVM.sh

ci-scripts/xml_files/enb_ue_usrp210_band7_epc_start.xml

ci-scripts/xml_files/enb_ue_usrp210_band7_test_05mhz_tm1.xml

ci-scripts/xml_files/enb_usrp210_band13_epc_closure.xml

...ipts/xml_files/x2ho_enb_usrp210_band13_full_terminate.xml

cmake_targets/CMakeLists.txt

cmake_targets/build_oai

common/config/DOC/config/devusage/api.md

common/config/DOC/config/devusage/struct.md

common/config/config_cmdline.c

common/config/config_paramdesc.h

common/config/config_userapi.c

common/config/config_userapi.h

common/utils/telnetsrv/telnetsrv.c