Add: Added IngestReportWarning service, jpa repository, etc. analogous

to the IngestReportError service so that "warnings" for missing fields
could be reported to the ingest report.  Required changes to
MetadataValidator, Spring controllers and angular code.

Fix: Changed WEB_SERVICE_ERRORs to SYSTEM_ERRORs.

Fix: In ingest report, default checkbox state for items under "Failed"
was incorrect.

Add: Added ability to report solr errors in the ingest report.