#394 Wrong mime-type recorded for png files

[Terry O'Neill]

I loading a job with many png files into a mainly clean DR database when attempting to test a reprocessing error. The mime-type of "image/png" appeared on the list of mime-types for criteria but when using the preview I found that all the png files had a mime-type recorded of "unknown/unknown". It seems that "unknown/unknown" was recorded in the data_object table but "image/png" was recorded in the quest_aip_content table. Also looking at the pf_data_object_xena_processing_record table it seems that the png files have been correctly guessed as PNG type. The data_object table is used for the reprocessing criteria and for Reporting so this issue could cause issues with these areas. The correct mime-type should be recorded throughout the database.