V1.3 project name v7 tag fix

Status: **Opened for visibility**

Reviewers: @tedtate @rrjamie 
JIRA: None

## Changes
- Makes sure Mobify.ajs is defined, even if the tag doesn't have it.

## How to test-drive this PR
- For a site that has a v7 tag, load a bundle and make sure Mobify.ajs is defined.