Add tests for search functionality

[sparrowDom]

Recently search functionality has been added but there are no automated tests for it yet. The test should cover:

• Apollo loaded GraphQl schema without errors
• elasticsearch has spawned with fixtures
• calling search on origin-js returns the expected result:
  • title field is being boosted
  • comission is taken into account when ranking listings
  • fuzzy search is working
  • minPrice and maxPrice aggregators have correct values