Transform "Schlagwortketten"

* add test according to hbz/nwbib#70
Merge pull request #588 from lobid/issues-lobid-70-schlagwortketten

Transform "Schlagwortketten"
Merge branch 'master' into issues-nwbib-53-apiBroken

Conflicts:
	lodmill-rd/src/test/resources/hbz01.nt