All of our docker images will have nightly tag

Change-Id: I258bb9114329f2523d025d27fbf57371839aced3
diff --git a/docker-build-image-pipeline.groovy b/docker-build-image-pipeline.groovy
index b94928e..1fbd9f0 100644
--- a/docker-build-image-pipeline.groovy
+++ b/docker-build-image-pipeline.groovy
@@ -46,6 +46,8 @@
             }
             if (!imageTagsList.contains("latest")) {
               imageTagsList << "latest"
+              //workaround for all of our docker images
+              imageTagsList << "nightly"
             }
           } catch (Exception e) {
             common.infoMsg("Impossible to find any tag")
@@ -98,4 +100,3 @@
     }
   }
 }
-