Merge pull request #114 from dobbymoodge/check-sources

<oo-admin-check-sources.py> Bug 1023363, Fix typo
Merge pull request #115 from sosiouxme/enterprise-2.0

<install> refactor rhsm+rhn conf; preflight checks
Fixing the RHSCL repoid for RHSM
<install> use infra or node to get priorities plugin
<install> provide options for several DNS situations