There are a bunch of optional env vars references in the rhsm registration script, but they weren't wrapped to be set -u safe so they cause build failures if any aren't set. Change-Id: I18326b618f0920efa4dbd805611c6ee66d33ebb0
This element contains the installation steps common to RHEL operating system versions. Change-Id: I37cce0bd5b5d31525f1335ecd416be570d36ad61