AthOnnxComps: use extends to auto-declare interface inheritance

Control/AthOnnx/AthOnnxComps/AthOnnxComps/OnnxRuntimeSvc.h

@@ -24,7 +24,7 @@ namespace AthOnnx {
    ///
    /// @author Attila Krasznahorkay <Attila.Krasznahorkay@cern.ch>
    ///
-   class OnnxRuntimeSvc : public asg::AsgService, virtual public IOnnxRuntimeSvc {
+   class OnnxRuntimeSvc : public extends<asg::AsgService, IOnnxRuntimeSvc> {
 
    public:
 

Control/AthOnnx/AthOnnxComps/src/OnnxRuntimeSvc.cxx

@@ -6,10 +6,10 @@
 
 namespace AthOnnx {
   OnnxRuntimeSvc::OnnxRuntimeSvc(const std::string& name, ISvcLocator* svc) :
-      asg::AsgService(name, svc)
+      base_class(name, svc)
    {
-     declareServiceInterface<AthOnnx::IOnnxRuntimeSvc>();
    }
+
    StatusCode OnnxRuntimeSvc::initialize() {
 
       // Create the environment object.