Fixing MR based on OAI feedback

The following was changed in this commit:
 - A new struct in the mac instance was created
   for all emulated L1 fields.
 - NR UE RRC state bug was fixed
 - Checking the RAR rnti based on the MAC instance
   ra.ra_rnti and not hardcoding to 0x10b
 - Modified the name of the new emulate_l2 flag
   to make sense: emulate_l1

openair2/LAYER2/NR_MAC_COMMON/nr_mac.h

@@ -264,6 +264,16 @@ typedef struct {
   uint8_t nbits;
 } dci_field_t;
 
+typedef struct {
+  bool expected_sib;
+  bool index_has_sib[16];
+  bool expected_rar;
+  bool index_has_rar[16];
+  bool expected_dci;
+  bool index_has_dci[16];
+  int active_harq_sfn_slot;
+} nr_emulated_l1_t;
+
 typedef struct {
 
   uint8_t     format_indicator; //1 bit