Comments connector test implemented

[kidunot89]

Partially fixes #1093

Summary checklist

• Adds delete_comment callback test
• Adds edit_comment callback test
• Adds spam_comment callback test
• Adds transition_comment_status callback test
• Adds trash_comment callback test
• Adds untrash_comment callback test
• Adds wp_insert_comment callback test
• Adds comment_duplicate_trigger callback test

[kasparsd]

Love these tests!

[kasparsd]

Could we keep using port 80 for consistency with the developer docs? Currently they're referencing stream.local without the port number.

[kidunot89]

My bad, must have forgot to change it back. I'll be sure to fix it when I rebase