Example hive site

In order to use maestro with hive, there needs to be a valid hive-site.xml somewhere (either on the cluster or in your jar). The instructions in the README only specify how to modify an existing hive-site.xml, but do not give any guidance to a new user setting up a maestro instance about how that file should look in the first place. These patches include a basic hive-site.xml that works for a local cluster.
I talked to @stephanh and we'll just move it to doc