Turns out it's buggy until the next Airwave version (8.2.8) according to Aruba support team...
What happens is pretty lame, you get the names, group and folder configured through the whitelist alright but...
Turns out the names of the IAPs only apply to the group view, once you go down to the VC level (which is used everywhere in Airwave including VisualRF) the names do not appears and it's back to the mac@...
Aruba support told me to disable/re-enable IGC in Airwave as a workaround but it makes it worses as it pushes the Mac@ from the VC as names for the IAPs in the group thus losing the names from the whitelist...
Ridiculous.