Openstack client does not throw exceptions on void operations with jersey connector

[tokle]

When using the jersey connector the openstack client does not throw exceptions on errors from the backend when the operation has a void return type.
E.g: deleting a node will return ok from the nova client even if the backend operation fails with a 401 Unathorized. The problematic code is in the OpenStackClient:

public <T> T execute(OpenStackRequest<T> request) {
    OpenStackResponse response =  request(request);
    return (request.returnType() != null && request.returnType() != Void.class) ? response.getEntity(request.returnType()) : null;
}

The last line of the execute method will return null regardless of having a non-ok status code. If the return type is not void, the response.getEntity method will throw an exception in case of a non ok status code (at least this is true in the case of the jersey connector).