APPS-2272 ajax url rails_relative_url_root fix.  If the relative url root is just a '/' after interpolation the url  becomes '//chronic_ping/parse' which translates to  'https://chronic_ping/parse'. So I am subbing the last slash from the  relative url root. This also means that we wont have any weird issues  with `/app/path//chronic_ping/parse`
APPS-2272 ajax url rails_relative_url_root fix. 
If the relative url root is just a '/' after interpolation the url 
becomes '//chronic_ping/parse' which translates to 
'https://chronic_ping/parse'. So I am subbing the last slash from the 
relative url root. This also means that we wont have any weird issues 
with `/app/path//chronic_ping/parse`

biola/chronic_ping,biola/chronic_ping,biola/chronic_ping