yum-validator: Add OSE 2.1 channel info to repos.ini

Bug 1097844
https://bugzilla.redhat.com/show_bug.cgi?id=1097844

Adds OSE 2.1 RHSM and RHN channel info to `repos.ini`, updates RHN/RHSM
common channel data with 2.1 version
Merge pull request #375 from dobbymoodge/add-ose-21

yum-validator: Add OSE 2.1 channel info to repos.ini
<oo-install> Add link to OpenShift Enterprise Deployment Guide
Merge pull request #376 from detiber/AddEnterpriseDocsLink

Add enterprise docs link