Merge fuse image streams into the xpaas image streams and use them in the templates

Common OpenShift image streams are generally installed into a common "openshift" namespace. The Fuse image streams should be merged in with the rest of the xPaaS image streams. See

https://github.com/jboss-openshift/application-templates/blob/master/jboss-image-streams.json

These should then also be part of the openshift ansible installer, see

https://github.com/openshift/openshift-ansible/tree/master/roles/openshift_examples/files/examples/xpaas-streams