Create client on service provisioning.
Debug logging
Is this needed then?

@see http://projects.spring.io/spring-security-oauth/docs/oauth2.html
 "The filter has to be wired into the application (e.g. using a Servlet initializer or web.xml configuration for a DelegatingFilterProxy with the same name)."
@see https://github.com/spring-projects/spring-security-oauth/blob/37fe453d3cf423a1cc0cafccb8e5075082adf67f/samples/oauth2/tonr/src/main/java/org/springframework/security/oauth/examples/config/ServletInitializer.java