Misc updates as a result of testing with latest OpenStack Mitaka RDO
packages from IBM:
- neutron.conf: disable neutron_rootwrap_daemon - non-functional.
- nova.conf: set lock_path to /var/lib/nova/tmp inline with rpm
packaging.
- run proxy install process during config-changed, ensuring that
any new compute hosts get installed and configured.
- enable and start services on install, as rpm packages install
disabled.
- refactor use of proxy in hooks module to ensure its not created
on module load, but as an when required.
- change behaviour of remote-key to write key to secured local file,
avoiding the need to run this charm from a local copy with the key
embedded.
README updated for any behavioural changes in configuration.
Change-Id: I53d7331a2ddcf73bc41bc8d73be5bf165bf55a92