busybox from dockerhub being used

[e-minguez]

charts/charts/metal3/0.9.1/charts/baremetal-operator/templates/tests/test-connection.yaml

Line 12 in 5d82785

image: busybox

We should probably switch to registry.opensuse.org/opensuse/bci/bci-busybox:latest instead? (and/or make it configurable like we do here

charts/charts/metal3/0.9.1/charts/baremetal-operator/values.yaml

Line 27 in 5d82785

images:

)

[hardys]

As discussed elsewhere I think this is just for helm test which we're not using/validating anywhere and isn't implemented for any of the other subcharts, so we can probably just remove these and rely on the deployment healthchecks instead