Change user activation complete URL to avoid conflicts
Change user activation complete URL to avoid conflicts

Because a separate django app is overriding 'accounts/activate/w+'
'accounts/activate/complete' was never being hit.

Fixes #1133

clever-crow-consulting/otm-core,recklessromeo/otm-core,recklessromeo/otm-core,RickMohr/otm-core,clever-crow-consulting/otm-core,maurizi/otm-core,clever-crow-consulting/otm-core,maurizi/otm-core,RickMohr/otm-core,recklessromeo/otm-core,RickMohr/otm-core,maurizi/otm-core,recklessromeo/otm-core,clever-crow-consulting/otm-core,maurizi/otm-core,RickMohr/otm-core