Made sure we can update an access plan of a product even if its acces…

[eri-trabiccolo]

Description

Fixes #272

How has this been tested?

unit tests

Types of changes

Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] My code has been tested.
• [x] My code passes all existing automated tests.
• [x] My code follows the LifterLMS Coding & Documentation Standards.

[eri-trabiccolo]

Failing test because of an issue fixed in #276