Feature request: Re-think testing roles

[skrolikowski]

Is your feature request related to a problem? Please describe.

$this->admin is used heavily in tests. Considering we now have an admin and owner role (the former now having only limited control panel access), we'll need to reflect this in the naming convention used.

Describe the solution you'd like

Change all occurrences of $this->admin to $this->owner.

Describe alternatives you've considered

We talked about $this->admin using the developer role, however we should add an additional user, $this->developer for dedicated tests which only the developer role can do.

Feature request checklist

• This is a single feature (i.e. not a re-write of the entire CMS)
• The title starts with "Feature request: " and is followed by a clear feature name (Ex: Feature request: add konami code to control panel)
• I have searched for existing issues and to the best of my knowledge this is not a duplicate