Redirect to the portal login page on permission error
Redirect to the portal login page on permission error

[#50383631] We shouldn't be redirecting to LARA's own login page, as we used to. This should fix it.

https://www.pivotaltracker.com/story/show/50383631
concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara,concord-consortium/lara