MDL-48190 behat: Fixed visitbackground in MoodleScenarioTester
MDL-48190 behat: php version updated to match moodle requirement
MDL-46891 behat: Minimum changes to support behat 3
MDL-46891 behat: Feature files can be passed via behat.yml
Fixed Moodle progress formatter, added class resolver

Removed selenium2 driver as it is not needed for now
Scenario and step tester needs to be looked at
Moodle definition printer has to be looked at
Removed old formatter
MDL-46891 behat: Added support for chainedSteps
MDL-46891 behat: Re-arranged classes
MDL-46891 behat: Pass moodle dir root to access moodle code
MDL-46891 behat: Printer teardown added
Check Selenium driver loading
Load custom moodle selenium2 driver