Update ruby-openid to fix seg fault when running test, refs #855

We are not really using openid anymore, but there are references to it in the
application, so it's better to keep the gem installed for now.
Tests for Notifier to always use 'en', complements bf5b13b20d

In some machines the tests were passing and in others they were failing
when trying to compare a string in 'en' with a string in 'pt-br'. Now we
set the language to be always 'en' when testing.