<install> register to RHN with --force; re-runnable
<install> introduce yum CDN base URL; refactor accordingly

Conflicts:
	enterprise/install-scripts/amazon/openshift-amz.sh
	enterprise/install-scripts/generic/openshift.sh
	enterprise/install-scripts/openshift.ks
Merge pull request #99 from sosiouxme/enterprise-2.0-cp

Enterprise 2.0 install