Fix broken tests

Author: darrelmiller

src/Microsoft.OpenApi/Models/OpenApiParameter.cs

@@ -259,7 +259,8 @@ public void SerializeAsV2WithoutReference(IOpenApiWriter writer)
             }
             // In V2 parameter's type can't be a reference to a custom object schema or can't be of type object
             // So in that case map the type as string.
-            else if (Schema?.UnresolvedReference == false || Schema?.Type == "object")
+            else 
+            if (Schema?.UnresolvedReference == true || Schema?.Type == "object")
             {
                 writer.WriteProperty(OpenApiConstants.Type, "string");
             }

test/Microsoft.OpenApi.Tests/Models/OpenApiParameterTests.cs

@@ -73,7 +73,8 @@ public class OpenApiParameterTests
                 {
                     Type = ReferenceType.Schema,
                     Id = "schemaObject1"
-                }
+                },
+                UnresolvedReference = true
             },
             Examples = new Dictionary<string, OpenApiExample>
             {