hasLightblueErrors can return true when getLightblueErrors returns null

[jblashka]

In AbstractLightblueResponse, hasLightblueErrors checks to see if the status is equal to "partial" but doesn't look to see if "errors" actually exist in the json.

So I have to do if(getLightblueErrors() != null) rather than if(hasLightblueErrors()), making that method pretty pointless