Fix failing cucumber tests.

 * Edit /submit path in paths.rb to be:
   /submit?submission_agreement=true
 * Change "new submission page" to "submit page" in cucumber feature
   scenarios. By doing so, I can be assured the submit path includes
   the 'submission_agreement=true' param.
 * In web_steps.rb change current_path to be assigned to
   URI.parse(current_url).request_uri
 * NOTE: the above method call was .path and now is .request_uri
   This method change affected none of the other tests and allowed me to
   avoid changing anything in the editor_emeritus_fills_in_old_magazine
   feature file. In this way I was also able to avoid adding an
   additional path to paths.rb which we had at first thought would be
   necessary. I know we were trying to avoid changes to web_steps.rb,
   I'd be glad to further discuss this.