SIMPLY-4238 HTTPS images

[keithbauer]

Description

Force images from the Axis360 API to be https instead of http.

Motivation and Context

SIMPLY-4238 This forces images from the Axis360 API to https for the Open eBooks project.

How Has This Been Tested?

Automated tests

Checklist:

• [x] I have updated the documentation accordingly.
• [x] All new and existing tests passed.

[keithbauer]

It might take some time but axis_reaper, and I think axis_monitor, will update resources to https as it processes them.