#23 Upsert System

[leoleader]

Changes

• Created service function for upserting system
• Created 2 unit tests for this service function
• Slightly modified typing and unit test for previous getAllSystems function

Notes

Since this is currently a private function that's not connected to client I just made it a void function
that takes in a string pertaining to the name of the system.

Test Cases

• Upserting a system that does not exist
• Upserting a system that does exist

Checklist

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Closes # 23

[Peyton-McKee]

W job on this

[Peyton-McKee]

W