DATASOLR-128 - Fix parameter assertions on PivotFields

Merged Pull Request #23
CLA: 61520130807033621 (Francisco Spaeth)
DATASOLR-129 - introduced null check when getting entity information

provide meaningfull error message on creating repositories for
unmanaged entities

merged pull request #26
CLA: 61520130807033621 (Francisco Spaeth)
DATASOLR-106 - Upgrade to Solr 4.6.0

Upgraded test configuration to match current release. Therefore the old
configuration had to be completely replaced in order to avoid conflicts
when starting embedded solr server.