VOL-612 - rename images to work better with public repository

Change-Id: I9679544987c3a08d0001928cfbc39d710a6c1eae
diff --git a/compose/docker-compose-logstash.yml b/compose/docker-compose-logstash.yml
index 53a875f..09d126a 100644
--- a/compose/docker-compose-logstash.yml
+++ b/compose/docker-compose-logstash.yml
@@ -2,7 +2,7 @@
 
 services:
   logstash:
-    image: "${REGISTRY}voltha/logstash:${TAG:-latest}"
+    image: "${REGISTRY}${REPOSITORY}voltha-logstash:${TAG:-latest}"
     environment:
       - log.level=info
     command: logstash -f /etc/logstash/conf.d/