Fix CookieConflictError in Selenium Tests

In some cases several cookies with the same name exist. The workaround
is to use the more precise .get() method, while specifying the Cookie
domain.

Change-Id: Ibbb5eae7b28093d858620adce022f48e5089d0a5
Fix Selenium tests that broke due to info_box changes

The structure of the HTML info boxes was changed so that several can be
displayed at the same time. This meant that the tests were no longer
able to find the box containing the serial of the token.

Change-Id: I21dc078d98918d62dfd5d3dee12c5a049bdb5fb5
Merge topic 'selenium'

* changes:
  Fix Selenium tests that broke due to info_box changes
  Fix CookieConflictError in Selenium Tests