Drop unused template
Remove trailing spaces
Synchronize heat.conf template with upstream

One interesting bit is that we stop setting log_file, and instead rely
on the auto-detection of the binary name to set it.
Do not use templates for default.yaml and policy.json on SUSE

We ship the files as part of the package.
Merge pull request #21 from vuntz/havana-sync

Synchronize config files with Havana