[Issues #21,#22,#23] Role Display Feature

[evelynzhengg]

User's role appears next to their username when they post a topic and when they post a reply (refresh is required to view tag on replies)

• Issue with updating schema to appropriately have role, leading to test failure.

How to test role displays:

• Run ./nodebb build tpl
• Navigate to “General Discussion”
• Create a new topic to see your role next to your username
• Go into the topic and make a reply
• Refresh the page to view your role next to the comment

Automated testing for role display:

• Test added to test/topics/events.js to ensure correct role assignment to each topic.
• Run test with npm run test

Issues Addressed:
#21
#22
#23

Role shows up next to topic (rendered in categories.tpl):

Role shows up next to the replies:

[Nita242004]

Standardize spacing, and make sure to fix linter tests