fix(client): Show the /force_auth error message on startup, if one exists.

* `.error` elements are invisible by default. Add the `.visible` class.

fixes #1504
Merge pull request #1505 from mozilla/issue-1504-invisible-error-on-force-auth

fix(client): Show the /force_auth error message on startup, if one exists.
tests(travis): disable shrinkwrap validation
fix(deps): update express and request dependencies to patched versions
fix(logger): fix for express logger api change
Merge pull request #1522 from mozilla/disable-validation-update-express

Disable validation and update express/request
tests(oauth): getCode tests were testing the wrong endpoint