Null username in ReviewActivity for the review image

[ashishkumar468]

Summary:
null is shown instead of the actual username in ReviewActivity for the image to be reviewed.
Steps to reproduce:
Click on Review from the nav drawer
What did you expect the app to do, and what did you see instead?
Instead of null, the actual username should have been shown.

Device and Android version:
One Plus 3T, Android &

Commons app version:
2.10.2-debug-master~081555c09

Screen-shots:

Would you like to work on the issue?
YES