Update:
it kind of worked. my character is a male qunari mage and i got him to wear some rouge armor. i can also get him to wear heavy armor. this is because of a few specific materials that i used. basically there are 3 materials that let you do this.
for leather it is Snoufleur (For Medium Armor)
for cloth it is Dales Loden Wool (For Light Armor)
for metals it is Silverite (For Heavy Armor)
Basically these 3 crafting materials can override the class restraints and let you wear any armor if one of these armors is put in your MAIN armor slot in the crafting menu
for medium armor, the main slot will be leather
for light armor, the main slot will be cloth
for heavy armor, the main slot will be metals.
So basically, if you have a mage and want to wear some rouge armor then you would get the schematic for either rouge armor or prowler armor. When crafting it you would use Snoufleur in the main armor slot (or else it wont work. For example, using silverite in the defense slot WILL NOT overide the class restraints because you cant put metal in the main armor slot for rouges).
If you wanted to use heavy armor(Warrior) you would craft a heavy armor with Silverite in the main armor slot
likewise, if you wanted to wear light armor (mage) you would use Dales Loden Wool in the main slot
I also found a merchant in the hissing wastelands that sells armor schematics that all look like rouge armor sets, which is a little strange. The merchant is in the canyon if you're interested. (Cause i know some people dont like the look of the long robes)
now as far as trying to equip human trained armor (i.e. warden battlemage armor) it is still impossible. I dont think its a glitch, i think the devs (as much as i love them) were just lazy and didnt impliment the armors for Qunari. theres know way that its a glitch. (But i hope it is!)