core: imagex_blog_featured dependency

## Ready State: Yes

This pull request is related to the following JIRA tickets: https://imagex.atlassian.net/browse/LDC-157

## Requirements & Dependencies

* This new module requires imagex_featured_content, features, imagex_blog_featured

## Deployment Instructions

* Merge code.

## Usage/Test Instructions

* ensure panel is created when imagex_blog_featured is  enabled.  confirm imagex_image is now part of blog CT