The latest audit updates allow Keystone to pass the
file-ownership and file-permissions audits.

Change-Id: Ib274ba7fcf8c4a299cda3509cc87a10bff990142
Func-Test-PR: https://github.com/openstack-charmers/zaza/pull/204

The charm-helpers project have re-licensed to Apache 2.0
inline with the agreed licensing approach to intefaces,
layers and charms generally.

Resync helpers to bring charmhelpers inline with charm
codebase.

Change-Id: Icedfb79814e186290a3120d953c9077e4e4504fe