Integrate cord-onos-publisher

Added cord-onos-publisher as "participating submodule".
- tested fetch, buildImages, and publish
- verified that "mavenrepo" shows up in integration
  docker registry
diff --git a/settings.gradle b/settings.gradle
index 1116206..d5f0856 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1,2 +1,3 @@
 include 'components/maas'
 include 'components/cord-tester'
+include 'components/cord-onos-publisher'