Deprecate quota_injected_file_path_bytes (update for Juno)

* Deprecate [DEFAULT]/quota_injected_file_path_bytes in favor of
  [DEFAULT] quota_injected_file_path_length.
* Remove quota_max_injected_file_path_bytes parameter.

Use new parameters for Juno like it's documented here:
http://docs.openstack.org/trunk/config-reference/content/nova-conf-changes-master.html

Change-Id: Ia408de8fa980b37e6d46dece8d90a83f2083df8a
Partial-Bug: #1391099
policy.json: Allow one to manage them from the puppet module

This commit allow a deployer to manage the policies via this module
It relies on augeas to change only the policy needed. The init takes
a hash of policies and apply them.

Change-Id: I534e76f4f7385e9057aaee0a5ec5d463dc918646
Merge "policy.json: Allow one to manage them from the puppet module"