Fixed EZP-19161: Remove redundant indexes/keys
Fixed: typos
Fixed EZP-20420 - Small CS issue in Repository/Values/Content/Location class
Fix some @package doxygen issues
Merge pull request #216 from crevillo/EZP-20420

Fixed EZP-20420 - Small CS issue in Repository/Values/Content/Location c...
PHPDOC: Try to mark internal ValueObject methods as internal
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
Remove ContentInfo->contentType: API
Remove ContentInfo->contentType: MVC
Remove ContentInfo->contentType: REST
Remove ContentInfo->contentType: Repository
Fixed: removed deprecated properties
Added: configuration for integration tests with Solr
Added: PHP 5.5 partially for travis