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.
Merge remote-tracking branch 'upstream/master'