AuthorDetails: Use msearch for AJAX requests

[ltog]

Multiple AJAX requests tend to get slow. Especially if there are many authors, e.g. in http://data.swissbib.ch/person/514ac9b2-4204-3bd1-b7e1-bf6a58d81530

[ltog]

Here is a query to search for multiple persons using a list of multiple ids: https://github.com/htw-pk15/vufind/wiki/Elasticsearch#suche-nach-mehreren-personen-mit-gegebenen-ids

GET /testsb/person/_search
{
  "query": {
    "filtered": {
      "filter": {
        "in": {
          "@id": ["http://data.swissbib.ch/person/825b0ab5-c490-38e8-af50-4ed444e87b44", "http://data.swissbib.ch/person/5b590f17-2263-309f-bf3a-6c21e1970ad9", "http://data.swissbib.ch/person/4ca6d8e1-694e-3fea-9cde-bc09a7b7f61c"]
        }
      }
    }
  }
}

[ltog]

It seems, filtered queries are not implemented yet. See /usr/local/vufind/httpd/module/LinkedSwissbib/src/LinkedSwissbib/Backend/Elasticsearch/DSLBuilder/Query