Release 5.0.0 - Juno

Changes in this release:
* Added ceilometer::policy to control policy.json
* Fixed bug in glance_image type
* Added parameter os_region_name to glance::api
* Added support for vSphere datastore backend
* Updated the calls to the glance command-line utility
* Added parameter swift_store_large_object_size to glance::backend::swift
* Bumped stdlib dependency to >=4.0.0
* Added parameter command_options to glance::cache::cleaner and glance::cache::pruner
* Added parameter package_ensure to glance::backend::rbd
* Added parameter manage_service to various classes
* Added parameters to control whether to configure users
* Migrated the glance::db::mysql class to use openstacklib::db::mysql and deprecated the mysql_module parameter
* Added parameter registery_client_protocol to glance::api
* Fixed ssl parameter requirements for kombu and rabbit

Change-Id: I5dcce1d748602dd46d409d51523b96a51709d285
Merge "Release 5.0.0 - Juno"