Bugfix: [LDC-460] Display comment title for `Contest` and `Contest entry` type

## Ready State: Yes

#### JIRA Reference: https://imagex.atlassian.net/browse/LDC-460

Display comment title for `Contest` and `Contest entry` type.

## Deployment Instructions

* Merge code.
* `drush fr imagex_contest -y`  
* Clear caches with `drush cache-clear all`

## Usage/Test Instructions

* Create node type contest, contest entry etc.