Always manage local_settings.py

If $compress_offline is false, local_settings.py becomes unmanaged
by Puppet. This is clearly wrong.

Move local_settings.py file resource out of condition and
establish notification relationship conditionally to $compress_offline
instead.

Closes-bug: #1383473
Change-Id: Ia7e4bc8e8f74c62ac624056883fb8c2910e2fe09
Merge "Always manage local_settings.py"