Add possibility to use settings to generate MappingModel models with wildcard path parameters. (#609)

* Add optional settings for WithMappingFromOpenApi

* .

* .

* cleanup

src/WireMock.Net.OpenApiParser/Types/ExampleValueType.cs

@@ -0,0 +1,18 @@
+namespace WireMock.Net.OpenApiParser.Types
+{
+    /// <summary>
+    /// The example value to use
+    /// </summary>
+    public enum ExampleValueType
+    {
+        /// <summary>
+        /// Use a generated example value based on the SchemaType (default).
+        /// </summary>
+        Value,
+
+        /// <summary>
+        /// Just use a Wildcard (*) character.
+        /// </summary>
+        Wildcard
+    }
+}