manifest: add zuul/ansible and ansible-config.conf

This change ensure the ansible plugins and the ansible-config.conf file
are installed with Zuul.

Change-Id: I321e52b29f1ca34d224c4e6fe33c60d5ac42590f

MANIFEST.in

@@ -1,5 +1,8 @@
 include AUTHORS
 include ChangeLog
+include zuul/ansible/*/*
+include zuul/ansible/*/*/*
+include zuul/lib/ansible-config.conf
 include zuul/web/static/*
 include zuul/web/static/static/*/*