Adding logs to properly follow reboot scenarios

Change-Id: I16aa4347e6225fd7986f317661ba9c3ed5bcccd4
diff --git a/VERSION b/VERSION
index 0eed1a2..ef8e66f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.12.0
+1.12.1-dev
diff --git a/internal/bbsim/devices/olt.go b/internal/bbsim/devices/olt.go
index c9068bd..9b99c79 100644
--- a/internal/bbsim/devices/olt.go
+++ b/internal/bbsim/devices/olt.go
@@ -322,7 +322,11 @@
 			}
 
 			for _, onu := range pon.Onus {
-				_ = onu.InternalState.Event(OnuTxDisable)
+				err := onu.InternalState.Event(OnuTxDisable)
+				oltLogger.WithFields(log.Fields{
+					"oltId": o.ID,
+					"onuId": onu.ID,
+				}).Errorf("Error disabling ONUs on OLT soft reboot: %v", err)
 			}
 		}
 	} else {
@@ -331,7 +335,11 @@
 			// ONUs are not automatically disabled when a PON goes down
 			// as it's possible that it's an admin down and in that case the ONUs need to keep their state
 			for _, onu := range pon.Onus {
-				_ = onu.InternalState.Event(OnuTxDisable)
+				err := onu.InternalState.Event(OnuTxDisable)
+				oltLogger.WithFields(log.Fields{
+					"oltId": o.ID,
+					"onuId": onu.ID,
+				}).Errorf("Error disabling ONUs on OLT reboot: %v", err)
 			}
 		}
 	}
@@ -342,6 +350,10 @@
 	// terminate the OLT's processOltMessages go routine
 	close(o.channel)
 
+	oltLogger.WithFields(log.Fields{
+		"oltId": o.ID,
+	}).Infof("Waiting OLT restart for... (%ds)", rebootDelay)
+
 	//Prevents Enable to progress before the reboot is completed (VOL-4616)
 	o.Lock()
 	o.enableContextCancel()
@@ -400,6 +412,10 @@
 		}).Warnf("Stopping OLT gRPC server")
 		o.OltServer.Stop()
 		o.OltServer = nil
+	} else {
+		oltLogger.WithFields(log.Fields{
+			"oltId": o.SerialNumber,
+		}).Warnf("OLT gRPC server is already stopped")
 	}
 }