tests(webdriver): Update Selenium version
Merge pull request #1644 from vladikoff/sel243

tests(webdriver): Update Selenium version
chore(tests): Insert a Relier into each test instance of FxaClient and View
Merge pull request #1645 from mozilla/issue-1623-refactor-fxaclient-relier-creation

refactor(client): Create one FxaClient and one Relier in app start.
feat(client): Add support for the `resume` token.

* `resume` is imported from the URL and stored in the Relier.
* fxa-client sends the token to the auth server in `signUp`, `signUpResend`, `passwordReset`, and `passwordResetResend`

issue #1623