Fix ES reindex using NXQL or doc id

Using 9.2 SNAPSHOT / Firefox / JSF UI

• Create two folders at the same level, each containing a file: "bananas" containing "patatos" and "strawberries" containing "forever"
• drop the ES index: curl -XDELETE 'http://localhost:9200/nuxeo/'
• Visit the search tab: you get an error page
• Reindex ES using a NXQL query (adapt the query below):
  SELECT * FROM Document WHERE ecm:path STARTSWITH "default-domain/workspaces/Start Creating Your Cont/Bananas"
• Go to the search tab: only the documents below the reindexed path should be searchable

=> currently every document is reindexed