Changed: removed duplicated directory separator
Changed: reordered results as per 8131dbb3ef140fb3a49c2352582f1f3702771400
Fixed: Unable to convert the value as a string

The value property can be a DOMDocument in which case it needs to be
saved as XML.
Fixed: the sortClauses of a Query must always be an array
Fixed: testLoadSubUserGroups() not testing correctly sub user groups
Fixed: Solr Search Handler refactored with changes made in the PAPI
Added: services to test in Solr integration tests