O-RAN E Maintenance Release contribution for ODULOW

Feature enhancements to 5G-FAPI TM, FHI Lib and wls_lib per FlexRan 21.03
This contribution is a joint collaboration of Intel and Tietoevry.
Includes fixes for issues found during US Plugfest Nov 2021.
More details in release notes.
Documentation of the Front Haul Interface had the collaboration from Franciscus Bimi, Jonathan, Liao and Professor Ray Guang from National Taiwan University of Science and Technology (NTUST)

Test Performed: Unit Tests using testmac and with odulow, FHI tests in loopback

Issue-Id: ODULOW-17

Change-Id: I8ae58506e065068a3923711c18e5e8a66cc4c809
Signed-off-by: Luis Farias <luis.farias@intel.com>