HiveColumnUtils contains all the functions to handle Hive columns
Several classes were renamed
HiveColumnsUtils used instead of TermUtils
Media types are indexed into Solr, solr schema contains a new  multi value field media_type
Solr batch and realtime indexer were modified to index media types
Merge branch 'multimedia' of https://github.com/gbif/occurrence into multimedia

# By Oliver Meyn
# Via Oliver Meyn
* 'multimedia' of https://github.com/gbif/occurrence:
  more date string tests
  adds to dwca IT to test multimedia extension