[SERV-888] Updates for IIIF Object Type column

[DRickard]

Updates:

• Add IIIF_OBJECT_TYPE constant to CSV.java
• Update CsvHeaders.java to set/retrieve/verify new column
• Update CsvParser.java to give preference to "IIIF Object Type" column (when it exists)
• Add "IIIF Object Type" column to good.csv and headers_whitespace.csv for parsing tests
• Add "IIIF Object Type" column to CsvParserTest.java tests
• Created hathaway_iiif_type.csv for functional/integration test
• Added test for handling "IIIF Object Type" column to PostCsvFIT.java

[ksclarke]

👍🏼

As we discussed in Slack, we can merge ignoring the Codacy complaint and I'm working on the Snyk issues in SERV-916.