For https://phabricator.kde.org/T7936 we need a new KDE Identity default avatar

Pinging to see if any action can be taken here. I recently returned to Kubuntu/Linux on a laptop after many years on OS X. The male smiley face avatar with a green tear drop for a nose looks unprofessional and didn't make a great first impression. Something simple and generic (or nothing?) would be a great improvement.