Make incore-lab to spawn based on the user group

[longshuicy]

Make incore-lab to spawn with different settings based on the user group. This should include number of vcpu, memory and disk size.

[robkooper]

I believe this is done already, see

incore-lab/authenticator/customauthenticator/custom.py

Line 173 in 1e5d439

def find_quota(self, user, auth_state):

Only thing that will change is once we have the service to get the quoutas to integrate it.