Security identity in contextual proxy not available in message driven bean

1. Contextual proxies are not accessible from message driven beans due to a ClassNotFoundException for `org.jboss.as.ejb3.component.concurrent.EJBContextHandleFactory$EJBContextHandle`.

2. Resolving the above leads to a further problem:

Contextual proxies (see https://javaee.github.io/javaee-spec/javadocs/javax/enterprise/concurrent/ContextService.html) delivered via ObjectMessage to a message driven bean do not completely survive object serialisation.

Specifically, the org.jboss.as.ee.concurrent.IdentityAwareProxyInvocationHandler that supports this has a transient instance variable:

   private final transient SecurityIdentity securityIdentity;

which means that the proxied object does not have access to the caller's security identity as required by the EE Concurrency Utility specs.