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/nucleus/principalNetworkDomain_test.go

@@ -271,7 +271,7 @@ func Test_pndImplementation_MarshalNetworkElement(t *testing.T) {
 	}{
 		{
 			name:    "default",
-			want:    "{\n\t\"Acl\": null,\n\t\"Bfd\": null,\n\t\"Components\": null,\n\t\"Interfaces\": null,\n\t\"Keychains\": null,\n\t\"Lldp\": null,\n\t\"LocalRoutes\": null,\n\t\"Messages\": null,\n\t\"NetworkInstances\": null,\n\t\"RoutingPolicy\": null,\n\t\"System\": null\n}",
+			want:    "{\n\t\"Acl\": null,\n\t\"Bfd\": null,\n\t\"Components\": null,\n\t\"Interfaces\": null,\n\t\"Keychains\": null,\n\t\"Lldp\": null,\n\t\"Messages\": null,\n\t\"NetworkInstances\": null,\n\t\"RoutingPolicy\": null,\n\t\"System\": null\n}",
 			args:    args{mneid},
 			wantErr: false,
 		},