Update local_settings.py to latest version

* Use local_settings.py.sample from Grizzly
* Make sure latest template includes Puppet settings
* Use @ notation for ERB template variables
  Fix Puppet 3.2 deprecation warnings (see Puppet #19058)
* Add ability to disable memcached by setting
  the 'cache_server_ip' parameter to False. It will fallback
  to using local-memory caching.
* Deprecate swift and quantum parameters. They have no effect.
* Fix deprecated settings:
    * CACHE_BACKEND (replaced by CACHES in Grizzly)
* Remove unused settings:
    * PROD (removed in Folsom)
    * USE_SSL (removed in Folsom)
    * SWIFT_ENABLED (removed in Essex)
    * QUANTUM_ENABLED (removed in Essex)

Change-Id: I825a2fa73c941c4e244bc03f7d0477fff5816ea0
Merge "Update local_settings.py to latest version"