'Create instance from instance system metadata
:param instance: Instance object
Creates a new object instance, initializing from the
system metadata "image_*" properties associated with
instance
:returns: an ImageMeta instance'

@classmethod
def from_instance(cls, instance):

    sysmeta = utils.instance_sys_meta(instance)
    image_meta = utils.get_image_from_system_metadata(sysmeta)
    return cls.from_dict(image_meta)
