Output from ls and ls-validators should be consistent

[wwestgarth]

There are a lot of difference in the output from ls and ls-validators which makes it difficult to code against in the system tests because you don't know which node representation you'll have. For example:

• ls returns a dictionary and ls-validators returns a list
• ls has the vega node information nested and but in ls-validators is flat
• ls uses "Name" for the nodeset name, but ls-validators is "NomadJobName"

I don't mind ls-validators returning less information but the json structure and namings should at least be the same.