Update unit tests

[everettraven]

Goal: Update the unit tests so that both controllers have their own test files and their functionality is tested separately

Acceptance Criteria:

• a controllers/scopeinstance_controller_test.go file is created that only contains testing related to the functionality in controllers/scopeinstance_controller.go
• controller/scopetemplate_controller_test.go is updated to only contain testing related to the functionality in controllers/scopetemplate_controller.go

[everettraven]

/assign @jmrodri