Silence redefine warning for OpenSSL::SSL::VERIFY_PEER

I was getting tired of seeing `.../config/initializers/omniauth.rb:1: warning: already initialized constant OpenSSL::SSL::VERIFY_PEER` and this change will silence that warning.

This is of course assuming that it's OK from a security perspective that we aren't doing SSL certificate verification. @twinge do you think we are OK suppressing this warning or should we take out the definition and use SSL verification (or just keep the warning as a reminder to think about it in the future)?