Remove csync_config

commit c585c73044260c36bfc4d86fe7189bfaf1bb7aee removed the use of it.
So remove this code completely as it is no longer used
Adapt the test to the changes in the exclude list

The exclude list was removed from csync in commit
f32d90165302b2ec0eb38111a7f9836bc815f7e6
Adapt the test.