Intermittent Test Failure for caasunitprovisioner

[Joseph Phillips]

This one can be replicated fairly easily in a loop, and hinders patch landing.

---

FAIL: worker_test.go:505: WorkerSuite.TestInvalidDeploymentChange

[LOG] 0:00.000 DEBUG test desiredScale changed to 1
[LOG] 0:00.051 DEBUG juju.kubernetes.provider.specs decoding stream as JSON
[LOG] 0:00.051 DEBUG test ensured deployment for gitlab for 1 units
worker_test.go:556:
    // First call is for "waiting"
    s.statusSetter.CheckCallNames(c, "SetOperatorStatus", "SetOperatorStatus")
/home/ubuntu/go/src/github.com/juju/juju/vendor/github.com/juju/testing/stub.go:248:
    return c.Check(funcNames, jc.DeepEquals, expected)
... obtained []string = []string{"SetOperatorStatus"}
... expected []string = []string{"SetOperatorStatus", "SetOperatorStatus"}
... mismatch at top level: length mismatch, 1 vs 2; obtained []string{"SetOperatorStatus"}; expected []string{"SetOperatorStatus", "SetOperatorStatus"}

worker_test.go:557:
    s.statusSetter.CheckCall(c, 1, "SetOperatorStatus",
        "gitlab", status.Error, "k8s does not support updating storage", map[string]interface{}(nil))
/home/ubuntu/go/src/github.com/juju/juju/vendor/github.com/juju/testing/stub.go:231:
    if !c.Check(index, jc.LessThan, len(f.calls)) {
        ...
    }
... obtained int = 1
... expected int = 1

[Joseph Phillips (manadart)]

https://github.com/juju/juju/pull/11458