code: function normalizeDisplayPages(pages) {
      if (!pages) {
          return;
      }
  
      let result = {};
      Object.keys(pages).forEach(k => {
          let item = pages[k];
          let {pageName} = getPageInfo(k);
          result[pageName] = item;
      });
  
      return result;
  }
docs: Normalize display page information
  input:
  {
  '<pagePath>': pageInfo
  }
  output:
  {
  '<pageName>': pageInfo
  }
  
  @inner
  @param {Object} pages the display pages information to normalize
  @return {Object}