Adding stop channel so injecting the stop channel does not inject nil

[shawn-hurley]

No description provided.

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[mhrivnak]

@shawn-hurley looks like the test is expecting the value to be nil for some reason, which is why CI failed.

controller-runtime/pkg/manager/manager_test.go

Line 331 in 8d93cc7

Expect(stop).To(BeNil())

[DirectXMan12]

/hold

I think this doesn't quite work