Update marionette_driver used in tbb-testsuite for esr60
In order to use our tests based on marionette with Tor Browser 8.0, we need to update the version of marionette_driver we use in the testsuite.
In order to use our tests based on marionette with Tor Browser 8.0, we need to update the version of marionette_driver we use in the testsuite.