Allow autoconfirmed to propose Consumers

Allow all autoconfirmed users to see the propose Consumer form, instead
of the deprecated emailconfirmed group. The proposal form still
requires a confirmed email to submit.

This should be deployed during 8/20 lightning deploy window

Change-Id: I5ffc258e2dd3d6123205bc56be831261d702c210
Merge "Allow autoconfirmed to propose Consumers"