[misc] pom changes: added jpa, change jide version
Issue #42: Add Solr indexing support for non-variant entities
Changes to the mapper and service for variant files.
Issue #19: Create an abstraction layer for managing JPQL queries
Added factory for query manager.
Issue #33: Add JQPL to Solr query translator
Improved group by queries.
Issue #33: Add JQPL to Solr query translator
Added support for IN queries.
Issue #15: Add Solr indexing support for variants
Integrate more variant queries: variant deletion, chart queries.