fix sssd.conf and nsswitch.conf handling

If this issue can be found on some Beta, then probably yes. If it's a problem found during your own testing while checking some of the latest changes (that are not on any Beta media), then no, not needed. Bug usually helps in "the future" to identify what was the problem in "the past". And if QA or anyone else reports the bug, then we can mark them as duplicates (instead of adding bug numbers to already released code).

And there is more: If a release manager evaluates whether to accept some change to build, bugzilla reference helps them to understand the importance of such issue (there is a bug summary, description, priority, severity, etc.)