Added changeCSRF to core interface.

janitor/runtime/src/main/java/org/pagan/janitor/cache/SessionCache.java

@@ -12,4 +12,5 @@ public interface SessionCache {
     public void put(String sessionId, SessionInfo sessionInfo);
     public void del(String sessionId);
     public Response loginSuccessResponse(SessionInfo sessionInfo);
+    public SessionInfo updateCSRF (SessionInfo sessionInfo);
 }

janitor/runtime/src/main/java/org/pagan/janitor/cache/SessionCacheImpl.java

@@ -74,4 +74,9 @@ public class SessionCacheImpl implements SessionCache {
         return builder.build();
     }
 
+    @Override
+    public SessionInfo updateCSRF(SessionInfo sessionInfo) {
+        return sessionInfo;
+    }
+
 }