Add dcterms:tableOfContents
Add dcterms:tableOfContents

While `dcterms:tableOfContents` in xMetaDissPlus requires the `lang` attribute,
mods:8a4667d4131de38728feecf86790cd5e2dc3a68f@lang, the scipt
will fallback to the first mods:language/mods:languageTerm element.

qucosa/qucosa-fcrepo-xmetadissplus