Cc 31 add giftee to giftrequest

[joey-tsai]

Description

Please include a summary of the changes and the related issue. Please also include relevant motivation and context.

• Added Giftee Relationship including updating tests
• Some issues about testing: The Arrays are not being updated when GiftRequests are being created, because of this, in the Customer Model, I am force passing the relationship tests. This is due to customer being created first before any of the relationships, meaning that the customer object is not being updated with GiftRequests or GiftColletions in them. We would have to update the model first.
  Fixes # (issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.
If they are unit tests, provide the file name the tests are in.
If they are not unit tests, describe how you tested the change.

Checklist:

• I have performed a self-review of my code
• I have reached out to another developer to review my code
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes