Profile does not work with geckodriver+remote webdriver

[pelme]

geckodriver changed the desired capability from firefox_profile (

pytest-splinter/pytest_splinter/plugin.py

Line 307 in 8e4cefd

kwargs['firefox_profile'] = profile.encoded

).

Instead, per https://github.com/mozilla/geckodriver#firefox-capabilities, moz:firefoxOptions/profile should be used.

I've verified that specfying moz:firefoxOptions/profile works as intended.