Issue Description:
The registry name for the living filing cabinet is very weird and cause problems for other mods.

What happens:
While developing my modpack I started to configure the mobs and needed a overview of the registered entities and their registry names, so I could blacklist them in other mods (e.g. Woot, EvilCraft). I made a registry dump for the entity registry and found that the Filing Cabinet with the living upgrade is registered as "realfilingcabinet:textures/entity/cabinettexture.png".

What you expected to happen:
Something easier and more readable like "realfilingcabinet:cabinet", similar to the normal minecraft registry names. Other mods might have trouble with with things like a "/" and "." in registry names.

Steps to reproduce:
I'm using the TellMe Mod to dump all registered entities via the command
/tellme dump entities

Affected Versions:
Minecraft: 1.11.2
Forge: 13.20.0.2259
Mods:
jei_1.11.2-4.2.10.248
realfilingcabinet-1.11.2-1.2.21
tellme-1.11.2-0.5.1

Your most recent log file where the issue was present:
https://paste.ee/p/s1eTz (log)
https://paste.ee/p/sAtnf (TellMe entity registry dump)

Further notes:
In RFCEntities.init() the ResourceUpgradeHelper.MOB_DEFAULT resource location is used, but that seems to be for a texture, therefore the weird registry name.

Heh, yeah, that would bother me too if I came across it myself. I'll have a look at fixing that

3e88128