A node that does not need upgrading, but that is upgradable, does not get provisioned

[ripienaar]

In the scenario where a node is upgradable, the helper says upgrade and the node is already at the right version, provisioning does not continue.

provisioner/host/host.go

Line 184 in 7c408c7

err := h.handleHostUpgrade(ctx)

This method returns nil for no error and also nil for skipped due to version constraint, we should make it return an additional skipped bool.