Resolve "Add generic app role to controller"

Description

This is useful to have as we probably want a generic app to have less influence than a typical admin role. Also one step towards having extra accounts for apps instead of using only the one existing default admin account.

Related to #370

integration-tests/application_tests/application_test.go

@@ -100,6 +100,7 @@ func TestMain(m *testing.M) {
 	// a user and role and update the user because of the login. After then only logins are done, no user and role creations.
 	// This means that this will block after trying once, because of the three attempts to read from eventChannels.
 
+	_ = <-application.addEventChannel
 	_ = <-application.addEventChannel
 	_ = <-application.addEventChannel
 	_ = <-application.updateEventChannel