DATASOLR-109 - fix ignored query parameters for highlight/facet

- requestHandler
- defaultOperator
- timeAllowed
- defType
DATASOLR-82 - Add MulticoreSolrServerFactory 

MulticoreSolrServerFactory allows on the fly creation of new SolrServer
instanced for a defined core by cloning a reference on. The url of the
reference server will be extended by the requested core, while the
reference remains untouched.
DATASOLR-110 - Adapt changes in Spring Data Commons

related to DATACMNS-350