Description of problem:

 With auth disabled, 'username' is seen in the persona dropdown.

This is not seen in MTA 6.0.1. I have attached screenshots from 6.0.1 and 6.1.

Version-Release number of selected component (if applicable):

 MTA 6.1

How reproducible:

 Always

Steps to Reproduce:

1. Disable auth after setting this in the Tackle yaml:
feature_auth_required: 'false'
2. With auth disabled, the application becomes a single user application. This user has
all roles/privileges.
3. As this single user, observe that the MTA UI shows 'username' in the persona dropdown.

Actual results:

 With auth disabled, 'username' is seen in the persona dropdown

Expected results:

Additional info: