Test and refactor Request Overview

[woxihyc]

User story

1. As a user
2. I want the request overview to be tested
3. So that I could use Request Overview properly

Acceptance criteria (multiple assignees)

• run the test following the test document
• test requirements are in line with the test requirements set by Atlassian for all plug-in developments
• Report and refactor problems if possible

Definition of done

• Can be demoed
• Fully tested with the unit test
• Code well structured and formatted (hold to code conventions)
• Clear explaination of code
• No syntax/runtime errors
• Codes are peerly reviewed
• Communicate issues by leaving comments on github