Fixed marc21.xml tests for linux

export_dir_kitodo/bagit/lin_valid_test2_bag/meta/marc21.xml

..._dir_kitodo/bagit/lin_valid_test2_bag/tagmanifest-md5.txt

...r_kitodo/bagit/lin_valid_test2_bag/tagmanifest-sha512.txt

export_dir_kitodo/bagit/lin_valid_test3_bag/meta/marc21.xml

..._dir_kitodo/bagit/lin_valid_test3_bag/tagmanifest-md5.txt

...r_kitodo/bagit/lin_valid_test3_bag/tagmanifest-sha512.txt

export_dir_kitodo/bagit/lin_valid_test4_bag/meta/marc21.xml

..._dir_kitodo/bagit/lin_valid_test4_bag/tagmanifest-md5.txt

...r_kitodo/bagit/lin_valid_test4_bag/tagmanifest-sha512.txt

export_dir_kitodo/bagit/lin_valid_test_bag/meta/marc21.xml

...t_dir_kitodo/bagit/lin_valid_test_bag/tagmanifest-md5.txt

...ir_kitodo/bagit/lin_valid_test_bag/tagmanifest-sha512.txt