code: function loadModelNames(modelPath) {
      modelPath = modelPath || envModelPath;
      debuglog(() => `modelpath is ${modelPath} `);
      var mdls = FUtils.readFileAsJSON('./' + modelPath + '/models.json');
      mdls.forEach(name => {
          if (name !== makeMongoCollectionName(name)) {
              throw new Error('bad modelname, must terminate with s and be lowercase');
          }
      });
      return mdls;
  }
docs: load the models