use right config file and delete the old one

src/test/resources/arsnova.properties.example

@@ -16,4 +16,7 @@ security.storepass=arsnova
 
 couchdb.host=localhost
 couchdb.port=5984
-couchdb.name=arsnova
\ No newline at end of file
+couchdb.name=arsnova
+
+# minutes, after which the feedback is deleted
+feedback.cleanup=10
\ No newline at end of file

src/test/resources/config.properties

-security.arsnova-url=http://localhost:8080
-security.cas-server-url=https://cas.thm.de/cas
-
-security.facebook.key=318531508227494
-security.facebook.secret=e3f38cfc72bb63e35641b637081a6177
-
-security.twitter.key=PEVtidSG0HzSrxVRPpsCXw
-security.twitter.secret=mC0HOvxiEgqwdDWCcDoy3q75nUQPu1bYRp1ncHWGd0
-
-security.google.key=110959746118.apps.googleusercontent.com
-security.google.secret=CkzUJZswY8rjWCCYnHVovyGA
-
-security.ssl=false
-security.keystore=/etc/arsnova.thm.de.jks
-security.storepass=arsnova
-
-couchdb.host=localhost
-couchdb.port=5984
-couchdb.name=arsnova
-
-# minutes, after which the feedback is deleted
-feedback.cleanup=10
\ No newline at end of file