Ironic should allow updates when node is on ERROR state

[Lucas Alvares Gomes]

If node a node fails at driver.deploy.tear_down() the node will go to ERROR provision state. At this state the user is not able to update the node because there's an transition in progress, that may lead a node to get stuck because user won't be able to leave that state without updating the node. E.g if the node failed to power off due some credential problems, you can't update the credentials of the node when in ERROR state)

Currently there's no workaround to be able to update the node once in this state.