Retrieve applayer by layerNames, but keep the type as layername: appLayer stays the same for each feature (per layerinstance), but layer can change.
Merge pull request #164 from flamingo-geocms/bug/wmsgetfeatureinfo-multiplelayers-per-instance-fails

Bug/wmsgetfeatureinfo multiplelayers per instance fails
Merge branch 'master' into deploy/webkaart-test