When Chef runs fail, the compiled resource will possibly display a password

In newer Chefs, a failure will show the compiled resource. My guess at the moment is that this will just require a change to `Chef::Artifact::NexusConfiguration#inspect`

```
nexus_configuration #<Chef::Artifact::NexusConfiguration:0x00000003c87870 @url="some erver", @repository="some repo", @username="some user", @password "some password", @ssl_verify=true>
```