unauthenticated swagger-ui on- server-port and proper security filter integration into Spring Security (#163)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Reviewed-on: https://dev.hostsharing.net/hostsharing/hs.hsadmin.ng/pulls/163
Reviewed-by: Marc Sandlus <marc.sandlus@hostsharing.net>

src/test/resources/application.yml

@@ -39,10 +39,6 @@ spring:
         change-log: classpath:/db/changelog/db.changelog-master.yaml
         contexts: tc,test,dev,pg_stat_statements
 
-# keep this in sync with main/.../application.yml
-springdoc:
-    use-management-port: true
-
 logging:
     level:
         liquibase: WARN