RegisterView: email varification on sign up fix

[Nikita-L]

I think signup email sending was working fine during invoking: RegisterView.perform_create, where we call allauth.account.utils.complete_signup, allauth.account.utils.perform_login. But now it stops at string in perform_login:

adapter = get_adapter(request)
    if not user.is_active:
        return adapter.respond_user_inactive(request, user)

Not surprising, as new user is not active. Thus, I have provided the solution for that in RegisterView.
Please, let me know if I have mistaken somewhere or the same can be achieved in smarter way.
Thanks!

[coveralls]

Coverage decreased (-0.03%) to 96.338% when pulling 6c913d5 on Nikita-L:registerview_email_varification_fix into 479a40d on Tivix:master.

[BarnabasSzabolcs]

Hi,
as a user of rest-auth, thanks for the contribution!
This repo is not maintained anymore, so the development moved to dj-rest-auth. (reference: #568)
It may be best, if you move this PR there. (and upgrade to using dj_rest_auth)

new repo link: https://github.com/jazzband/dj-rest-auth (I'm not the upkeeper of that repo, it just makes sense for me to help you merge your PR)

Many Thanks,
Barney