Fix EZP-23394: upgrade Solr backend to 4.10.1

Removed unused and deprecated field types in schema.xml, uncommented deprecated update handlers in solrconfig.xml that are not in use in the default eZ Find installation
Merge pull request #174 from ezsystems/ezp-23394_solr_upgrade

Fix EZP-23394: upgrade Solr backend to 4.10.1