gNB nrUE SA: improve security
The gnb sa improve security and addition security in nrUE side.
The base is MR1242,
NIA2 and NEA2 have been tested, both for SRBs and DRBs. It should work now.
There is a new section "security" added to the gnb configuration files. If not set, default is NIA2 and NEA0 and DRB no integrity. I think it should work for SA and NSA.
and I added nrUE security.
- Add kgnb calculation in nrUE and deliver security key in nrUE RRC.