UI Bug: When publishing a new CCV version, I always see the following warning/info message:

Duplicate repositories in content view versions
Repositories common to the selected content view versions will merge, resulting in a composite content view that is a union of all content from each of the content view versions.

This is displayed whether or not there are any duplicate constituent CV repositories.

I am pretty sure the bug is this line: https://github.com/Katello/katello/blob/master/webpack/scenes/ContentViews/Publish/CVPublishForm.js#L69

I am pretty sure it needs to be && instead of ||. Right now `duplicateRepos` is normally an empty list, so `duplicateRepos !== null` is true making the entire disjunction true in the case when the message should not be displayed.

Since I don't have the dev environment/experience for fixing js bugs, I am hoping someone else can quickly verify the fix and open a PR.

QE Tracker for https://issues.redhat.com/browse/SAT-23951
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2269403