Explicit include openstack-common::messaging

The attributes from this file need to be accessable to prevent

undefined method `[]' for nil:NilClass
54>> case node['openstack']['mq']['service_type']
Use region from keystone settings

The keystone barclamp got the possibility to set a custom region
name. This name must be used by other barclamps as well.

related to: https://bugzilla.novell.com/show_bug.cgi?id=896481
Merge pull request #24 from toabctl/custom-region-support

Use region from keystone settings
Merge pull request #23 from toabctl/add-include

Explicit include openstack-common::messaging