DAM-324: Removing format field from ExternalVideos
Remove format field from dublin_core datastream
test_prep script needs to re-index solr after loading Fedora fixtures
Include format field for discovery export
Correcting discovery export methods to include discoverable items

Note: this reverts commt 8ec2d4abc96f7dabb86ccb33eb0902f40c443df8 which
was and incorrect adjustment and did not reflect the correct
expectations.
Adding-in Blacklight-schema facet fields
Using .collect to avoid NilClass error when using .each
Collection is no longer a facet for Media Type