Change publish_catalog
Change-Id: Icaaee4402eefb8c65a17aab862008a8e0fd06ffe
I makes the target.files iterable, this change solve the issue 
presented here https://groups.google.com/a/onosproject.org/forum/?utm_medium=email&utm_source=footer#!msg/onos-dev/KUH_S_JUYU8/lsb0QQO4AQAJ
diff --git a/tools/build/bazel/publish_catalog.bzl b/tools/build/bazel/publish_catalog.bzl
index edf9569..199d67e 100644
--- a/tools/build/bazel/publish_catalog.bzl
+++ b/tools/build/bazel/publish_catalog.bzl
@@ -33,7 +33,7 @@
             packaging = classifier
             classifier = None
 
-    for f in target.files:
+    for f in target.files.to_list():
         print("%s\t%s" % (f.path, _remote(group_id, artifact_id, version, packaging, classifier)))
     return []