Ie vision router

- The intent of this change is to allow older IE to skip the shebang support when we request the Router UI. 
- Thus enabling automated integration testing of IE features and degradations. 
- This change works for IE8 and IE9 in local testing from the application end.
- However, the router UI also uses [poe-ui](/poegroup/poe-ui), which is not verifiable until this goes to prod.