text: Title: Remove `export *` pattern from Data plugin
  Body: `export *` makes it easy for a developer to accidentally expose functionality on a plugin's public API, and so should be avoided in favor of explicit exports.
  
  Looks like `data/common/index.ts` has quite a few:
  https://github.com/elastic/kibana/blob/master/src/plugins/data/common/index.ts#L9 