Concurrency issue in the end to end tests

[zregvart]

The build #1150 failed with:

=== RUN   TestPlatformUpgrade
Camel K installed in namespace test-7ae995dd-f1fe-4a9f-b243-99b98ffaf955
--- FAIL: TestPlatformUpgrade (7.94s)
    upgrade_test.go:40: 
        Expected
            <*errors.StatusError | 0xc000434240>: {
                ErrStatus: {
                    TypeMeta: {Kind: "", APIVersion: ""},
                    ListMeta: {SelfLink: "", ResourceVersion: "", Continue: ""},
                    Status: "Failure",
                    Message: "Operation cannot be fulfilled on deployments.apps \"camel-k-operator\": the object has been modified; please apply your changes to the latest version and try again",
                    Reason: "Conflict",
                    Details: {
                        Name: "camel-k-operator",
                        Group: "apps",
                        Kind: "deployments",
                        UID: "",
                        Causes: nil,
                        RetryAfterSeconds: 0,
                    },
                    Code: 409,
                },
            }
        to be nil

Looks like a concurrency issue in the end to end test suite or in the operator.

[lburgazzoli]

@nicolaferraro I think Expect(scaleOperator) like here should be replaced by Eventually(scaleOperator) as the update operation may fail for conflict

[nicolaferraro]

Yeah, right. Together with some currying on the scale function.