Upgrade and pin Behat and dependencies, refs T299

Summary: Newer versions seem to break the HTML tests. Locking in a version of Goutte as well.

Test Plan:
```
bin/behat -c application/tests/behat.yml -f progress application/tests/features/api.oauth.feature
```

Reviewers: rjmackay, dkobia, eyedol

Subscribers: lkamau

Maniphest Tasks: T299

Differential Revision: https://phabricator.ushahidi.com/D125