normalize docker-compose service that has name with underscore

kubernetes or openshift does not allow underscores in the object
names, while docker-compose does, in this commit the code has been
added to convert underscores to hypens.

pkg/loader/compose/compose.go

@@ -391,3 +391,7 @@ func handleServiceType(ServiceType string) string {
 		return ""
 	}
 }
+
+func normalizeServiceNames(svcName string) string {
+	return strings.Replace(svcName, "_", "-", -1)
+}