Implement Project config endpoints

[PMooreWand]

Adding implementation of project/config.
Get and Put commands implemented.
Added new parser method to ProjectsParser.
Added new tests to ProjectParserTest and
ProjectApiClientTest

[PMooreWand]

Closing pull for now trusted example in gerrit docs but gson parsing fails to map the extensionspanel map from json. Closing until get that resolved

[uwolfer]

@PMooreWand Does it fail in Gerrit itself? Also using a curl command? Then you should report it against Gerrit IMO.

[PMooreWand]

It's Gson deserialisation the ConfigInfo between 2.16 and 3.7 changed from
public Map<String, List<String>> extensionPanelNames;
to
public ImmutableMap<String, ImmutableList<String>> extensionPanelNames;
So probably more the case that I can not just call gson.fromJson without more logic for the mapping.

[uwolfer]

So probably more the case that I can not just call gson.fromJson without more logic for the mapping.

Not sure, but probably this helps in your case? https://stackoverflow.com/questions/13623175/deserialize-to-an-immutablemap-with-gson

[uwolfer]

Happy to see that you were able to resolve the issue. Could you please reformat the newly created code (there are some minor code style inconsistencies mostly related to white spaces)?