Add Large pages meta definition
Add Large pages meta definition

This metadef enables Guest Memory backing namespace
and large pagesize property in Nova::Flavor,
Glance::Image, Cinder::Volume(image)
resource types metadata

Change-Id: I6566622a026d80115993cce1b5dc29878bcef0b7
Closes-Bug: #1476732

klmitch/glance,dims/glance,rajalokan/glance,stevelle/glance,stevelle/glance,openstack/glance,openstack/glance,openstack/glance,klmitch/glance,rajalokan/glance,dims/glance