Add randomized anonymous names for anonymous posts

[rmurugan58]

Estimated effort:
This task will take a bit of effort to go through a list of random anonymous names and assign one as the author on any post that is marked as anonymous.
Dependencies among tasks:
This task has dependencies on issue #6 and issue #7 because the anonymous posting capability and UI need to be fully working so that this user naming feature can be added.
Initial assignments for team members:
This task will be a stretch goal so we will assign this to the whole team to work on under the condition we finish both of our current sprint goals successfully with time left.
Milestones:
This task should be completed if there is time remaining at the end of Sprint 2.
Acceptance criteria:
We will test this feature by making tests on the UI where users make posts anonymous and checking if those posts have a randomized anonymous name as the author when they are posted.