fix size checks of CCCH

it was at the wrong place
it was also wrong (< instead of <=)

See merge request !25

it was at the wrong place
it was also wrong (< instead of <=)

Improved common lib



See merge request !24

Merge branch 'develop' of https://gitlab.eurecom.fr/oai/openairinterface5g into feature-34-test_framework

when doing a merge request from oai-internal to oai.

Merge branch 'Feature-6-fix_test_core_network_with_scenarios' of gitlab.eurecom.fr:oai/openairinterface5g into Feature-6-fix_test_core_network_with_scenarios