[esh-authz2] AbstractSecurityHandler rework needed

[svilenvul]

AbstractSecurityHandler is currently performing authentication for second time.

The HTTP request context already contains Authentication object that can be accessed:

    @Override
    public Principal authenticate(ContainerRequestContext requestContext) {
    	Authentication auth = (Authentication)requestContext.getProperty(Authentication.class.getName());
		return new SmartHomePrincipal(auth);
    }  

This will affect subclasses as well.