March 2022 - Some little CI fixes

• The quectel CM program output is now redirected to a file. Easier to follow when running
• I added -i 1 option to all server iperf commands to have details
• module-based iperf logs are also copied to the RAN enb log folder so they are artifacted
• iperf3 console output was badly formatted
• docker kill --signal INT does not stop the container
• Added utility python script to make unique docker image tag on docker-hub
• cppcheck stage compares with latest develop stats --> still not failing pipeline