Make solr core retrieval more flexible
Check duplicate on basis of filename instead of name
Revert "Check duplicate on basis of filename instead of name"

filename is not in owncolumns and in the end it doesn't make a difference

This reverts commit 2aa8f0079cd51a249a3af133c562961ce449c8fd.
added new payment option wirecard for shop

with wirecard its easy to add a few payment options to your shop