Changes to Check the validity of a genome assembly accession

added the new DEFAULT enum value to the request property include_annotation_type/items

removed the enum value GENOME_GB of the request property include_annotation_type/items

the request property default value DEFAULT was added

the hydrated request property default value FULLY_HYDRATED was added

the request property default value DEFAULT was removed

the hydrated request property default value FULLY_HYDRATED was removed

removed the enum value ASM_STRUCT of the request property include_annotation_type/items

removed the enum value DEFAULT of the request property include_annotation_type/items

removed the media type application/json for the response with the status default

added the media type text/plain for the response with the status default