Enable export and import of SDN configuration

resolves #269 (closed)

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

controller/northbound/server/pnd.go

@@ -497,7 +497,7 @@ func (p PndServer) SetMneList(ctx context.Context, request *ppb.SetMneListReques
 			log.Error(err)
 			return nil, status.Errorf(codes.Aborted, "%v", err)
 		}
-		mneID, err := pnd.AddNetworkElement(r.MneName, r.TransportOption, sid, uuid.Nil)
+		mneID, err := pnd.AddNetworkElement(r.MneName, r.TransportOption, sid)
 		if err != nil {
 			log.Error(err)
 			return nil, status.Errorf(codes.Aborted, "%v", err)