1. The preamble index in the NRUE is random for SA.
   Using the preamble index from the mac->ra is
   correct.

2. The dl_pathloss calculated is from L1. We should
   shunt this feature out for our emulated mode. If
   we add the abstraction later, we can model the
   pathloss in the proxy and update it in the RA
   procedure of the NRUE.

3. Checking that the crnti != t_crnti is not valid
   for SA mode. And may only be needed for multi-UE
   in NSA mode. We might be able to delete it all
   together. For now, we only use for NSA mode.

4. Checking the RAR based on rnti = 10b and not the
   RA_STATE is better.