add /api/rbac/context + /api/hs/accounts/current endpoints (#189)

Co-authored-by: Michael Hoennig <michael@hoennig.de>
Reviewed-on: https://dev.hostsharing.net/hostsharing/hs.hsadmin.ng/pulls/189
Reviewed-by: Marc Sandlus <marc.sandlus@hostsharing.net>

src/main/resources/application.yml

@@ -72,6 +72,9 @@ metrics:
 logging:
     level:
         org.springframework.security: info
+        org.springframework.web: DEBUG
+        org.springframework.web.method.annotation: DEBUG
+        org.springframework.validation: DEBUG
 # HOWTO configure logging, e.g. logging to a separate file, see:
 #   https://docs.spring.io/spring-boot/reference/features/logging.html