Don't track added_files in deploy environment processing
Don't track added_files in deploy environment processing

We need to download these to the local tmpdir, but there's actually
no need to track each individual file as they're not used in the
processing of environments (the heatclient resolution just looks
in the tmpdir)

Change-Id: I441ecb13d43ba7e44b4cb3f2e6bd3fa388fbbadb

openstack/python-tripleoclient