build_oai script and cmake updated - rf device and transport protocol libraries are dynamically linked Note: EXMIMO not supported yet (even though compilation is successful)

lte-softmodem updated to reflect the fact that ethernet is not considered a device anymore- '-M' option changed used to be RRH IP address now it's flag for local/remote RF

1. update ethernet library-raw/udp modes supported 2. rrh_gw UE/eNB_trasport files updated accordingly

Merge branch 'develop' into feature-52-rrh-gw

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

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

adding error checks in dlsim