The CIMI spec does not permit providers setting properties on their
own. They are strictly for use by the client.
The 'entities' table now associates entries with CIMI::Model objects rather
than backend objects, and treats the DB as a proper look-aside cache.

This has the advantage that converting from backend objects is decoupled
from looking up the common attributes we store in the database (name,
description, properties)

The lookup of common attributes now happens when the model object is
constructed (at the point that the :id attribute is set, to be exact), and
can be saved with a call to its save method.
passing realm option when creating a new VM
DTACLOUD-416 do not base64 encode the user data
Openstack: Adds 'launch_time' attribute mapping to instance collection
[Core] add launch time to html instance view - related DTACLOUD-455

https://issues.apache.org/jira/browse/DTACLOUD-455
Deltacloud - adds maps openstack 'regions' to deltacloud realms - DTACLOUD-443

https://issues.apache.org/jira/browse/DTACLOUD-443

API-Change: Added the 'resource_types' attribute to Realm model
Deltacloud - adds EC2 driver import key functionality - DTACLOUD-438
(+updated gemspec for aws 2.7.0 required here)

https://issues.apache.org/jira/browse/DTACLOUD-438
Allows to specify a username when running a comman - DTACLOUD-458
Rename aruba driver to arubacloud driver - DTACLOUD-444

https://issues.apache.org/jira/browse/DTACLOUD-444
Fix issue with arubacloud driver - savon client configuration method changed

https://issues.apache.org/jira/browse/DTACLOUD-444
SITE: Aruba driver name change DTACLOUD-444

https://issues.apache.org/jira/browse/DTACLOUD-444
[Core] DTACLOUD-450 update gemspec for latest openstack rubygem 1.0.9

https://issues.apache.org/jira/browse/DTACLOUD-450
CIMI Tests: Adding Resource Metadata test part 4, InitialStates

TrackedAt: http://tracker.deltacloud.org/patch/d7174327854a3ad6fe13a891f7fdd22c980dbc9e
CIMI - Test Plan, Resource Metadata Capabilities - incorporating review changes

TrackedAt: http://tracker.deltacloud.org/patch/f59c14c0c59c1f89e10d372121a8aa7aae58a4d3
CIMI: fixing a few typos in comments
CIMI: added common attribute 'updated' to base model. Not used anywhere yet.
[Core] - make sure realms.resource_types is never nil - DTACLOUD-460

https://issues.apache.org/jira/browse/DTACLOUD-460
DTACLOUD-437 update gemspec for latest rbovirt rubygem 0.0.17

TrackedAt: http://tracker.deltacloud.org/patch/1ea1a5495bb4c795274bf127c4a22eb0f3cd38b1
DTACLOUD-457 RHEVm, Passing an invalid instance ID to start instance results in traceback with 500.

TrackedAt: http://tracker.deltacloud.org/patch/0f9ec84ff0ad613e28d1b49c3038a75010d56393