DS-2253: bumping solr version

https://jira.duraspace.org/browse/DS-2253

Managed to bump solr version to 4.10.2.
Caveats: Removed the overridden FacetComponent class. This was added for a bug in SOLR-3 and is no longer necessary. Furthermore it breaks the pivot facet functions of solr 4.
Added a solr class with constants which is not present in solrj: ExtractingParams. This was the sole reason why dspace-api had a dependency on solr-cell; through solr-cell on solr-core. Copied the class removed the overbroad dependency as to keep the lucene version used for the lucene search index on 4.4.
I have tested: discovery; oai; statistics.