Add open data as parameter of /elasticsearch/:sessionId/stats/instrument/metrics

We would like to get the statistics of the open data only.

It means to support a new param in the api for openData and add the following filter:

         {
            exists: {
              field: "investigationDOI",
            },
          },
          {
            range: {
              releaseDate: {
                lt: "now/d",
              },
            },
          },

Required by @andy.gotz