Fixing Fatal log for sTag and makefile custom docker properties

Change-Id: Ibe3111d330713c381ded6ba97f2b164fe08f7d07
diff --git a/internal/bbsim/devices/uni_port.go b/internal/bbsim/devices/uni_port.go
index eeda028..c60ed7a 100644
--- a/internal/bbsim/devices/uni_port.go
+++ b/internal/bbsim/devices/uni_port.go
@@ -164,7 +164,7 @@
 				// check we're not going over
 				if nextStag[s.Name] > 4096 {
 					uni.logger.WithFields(log.Fields{
-						"cTag":    nextCtag[s.Name],
+						"sTag":    nextStag[s.Name],
 						"Service": s.Name,
 					}).Fatal("s-tag-limit-reached-too-many-subscribers")
 				}