BDD re-write: Add Roles to User Test

Goal: This test does not have related selenium tests to create a workflow, hence the goal is to have it converted to BDD.

Link to the test:

1. RA-738

Guidance: 

To complete this task, you will need to do the following within https://github.com/openmrs/openmrs-contrib-qaframework: 

1. Create Feature File in the correct location here: https://github.com/openmrs/openmrs-contrib-qaframework/tree/master/qaframework-bdd-tests/src/test/resources/features 
2. Create Page: Follow sample page files at https://wiki.openmrs.org/pages/viewpage.action?pageId=235277297
3. Write Steps in Gherkin (Guidance here: https://cucumber.io/docs/gherkin/reference/)
4. Complete the test in Selenium using the OMRS QA Framework
5. Add a "Roles" test status pill to the QA Framework Repo README under the 2.x RefApp section