Add some system metadata values to the `text` aggregated Solr field

[laurenwalker]

When doing a full-text search using the text field, it would be helpful to be able to search for system metadata values as well as science metadata values. For example, with the new DataONE MN METAGRIL, I tried searching "metagril" on search.dataone.org and got 0 results, even though their MN name is "METAGRIL". We should aggregate some of the sys meta fields, like originMN, submitter, rightHolder, and fileName. This should be done in Metacat and the CN indexer