Rename property to the proper one

* fix the missing context information , s.: #304

The non-ZDB-Isil data had wrongly `skos:alternateLabel` as property, when it should be `skos:altLabel`. I changed this static data and copied it into hdfs. The data cannot be seen at them moment because of #417 - when fixed have a look at e.g. http://lobid.org/organisation/LB-ZmNDL. 

So now we use the `skos:altLabel` for both: the static non-ZDB data and as of late for the ZDB-Isil data.

Will be deployed after this weekend.