Allow eliding owner and new NestedClass if owner is the same

[aeplay]

Before

  var pipeline = new Pipeline({
    pipelineId: "test",
    environments: new ListOfEnvironments([
      new Environment({
        name: "L3",
        status: "RUNNING",
        executionId: "execId",
      },{ owner })
    ],{ owner }),
  }, { owner });

After

  var pipeline = new Pipeline({
    pipelineId: "test",
    environments: [
      {
        name: "L3",
        status: "RUNNING",
        executionId: "execId",
      }
    ],
  }, { owner });

Thanks @markmelville

[gdorsi]

In progress as part of https://github.com/garden-co/jazz/pull/1547

[gdorsi]

Landed!