AADGroup: Fix issue when filtering groups by display name

[ricmestre]

Pull Request (PR) description

Latest release introduced a fix for supporting filtering groups that contained character ' in their displayname, nevertheless this also introduced a bug that now all ' characters were doubled including the ones used in the filter itself.

This fixes that issue by replacing ' with '' only in the DisplayName of the group and not of the filter.

While here also removed showing the current values after Get-TargetResource since I added that on previous release to the Test-TargetResource like it's done across the whole tree.

This Pull Request (PR) fixes the following issues

• Fixes #4394