Empowerment/circle fixes

[egh]

JIRA issue: None

What this PR does:

Our builds seem to be failing on circle. I'm guessing this is due to the firefox 60 upgrade.

I upgraded the selenium webdriver, but then geckodriver stopped working. So I updated geckodriver-helper, but this is broken in the latest version on Linux. (https://github.com/DevicoSolutions/geckodriver-helper/pull/6)

So I dropped geckodriver helper, which was kind of silly anyhow, and downloaded geckodriver directly from github.

Reviewer tasks (these should be checked or somehow noted before passing on to PO):

• [ ] I read through the JIRA ticket's AC before doing the rest of the review
• [ ] I ran the code (in the review environment or locally). I agree the running code fulfills the Acceptance Criteria as stated on the JIRA ticket
• [ ] I read the code; it looks good
• [ ] I have found the tests to be sufficient for both positive and negative test cases

[benjaminkreen]

i forgot to purge geckodriver-helper by gem uninstall geckodriver-helper