Setting UE and nrUE IP address in config file.

1. Removed hard coded IP address in the code for UE and nrUE's remote address.
2. Read IP address from config file for UE and nrUE's remote address.

executables/nr-uesoftmodem.c

@@ -480,6 +480,7 @@ int main( int argc, char **argv ) {
   NB_INST=1;
   PHY_vars_UE_g = malloc(sizeof(PHY_VARS_NR_UE **));
   PHY_vars_UE_g[0] = malloc(sizeof(PHY_VARS_NR_UE *)*MAX_NUM_CCs);
+  RCconfig_nr_ue_L1();
 
   if (get_softmodem_params()->do_ra)
     AssertFatal(get_softmodem_params()->phy_test == 0,"RA and phy_test are mutually exclusive\n");