The goal is to add a behat test to verify a group may be given a description and a picture

QA test to be automated: MDLQA-143

QA testing instructions

This test requires a course containing several students and group mode set to visible groups or separated groups in the course settings.

1. Log in as a teacher, access the course and follow the groups link in the course administration settings.
2. Click the 'Create group' button and add a group name, description, upload a picture and save the changes.
3. Add at least one student to the group.
4. Go to the Participants page and click on the name of a student in the group.
5. Verify that the group is listed in the student's course profile.
6. Click on the name of the group.
7. Verify that the group name, description and picture is displayed on the group page and group members are listed.