<oo-admin-yum-validator> Stop if ver/sub can't be detected always

This reverts a change from 55341cae - If the version or subscription
aren't specified and can't be guessed, `oo-admin-yum-validator` should
always stop, even if `--report-all` or `--fix-all` are specified.
Merge pull request #227 from dobbymoodge/master

<oo-admin-yum-validator> Always stop if ver/sub can't be detected