do not delete LCG config during reset of BSR procedure (#269)

- this caused an issue after HO when the LCGs where gone
  and hence no BSR was provided for DRB until RRC reestablishment

srsue/src/mac/proc_bsr.cc

@@ -43,6 +43,13 @@ bsr_proc::bsr_proc()
   next_tx_tti = 0; 
   triggered_bsr_type=NONE;
 
+  for (int i=0;i<MAX_LCID;i++)  {
+    lcg[i]        = -1;
+    priorities[i] = -1;
+    last_pending_data[i] = 0;
+  }
+  lcg[0] = 0;
+  priorities[0] = 99;
 }
 
 void bsr_proc::init(rlc_interface_mac *rlc_, srslte::log* log_h_, mac_interface_rrc::mac_cfg_t *mac_cfg_, srslte::timers *timers_db_)
@@ -69,13 +76,6 @@ void bsr_proc::reset()
   reset_sr = false; 
   sr_is_sent = false; 
   triggered_bsr_type = NONE;
-  for (int i=0;i<MAX_LCID;i++)  {
-    lcg[i]        = -1; 
-    priorities[i] = -1; 
-    last_pending_data[i] = 0; 
-  }        
-  lcg[0] = 0; 
-  priorities[0] = 99;   
   next_tx_tti = 0;
 }