For #531. Escape HTML when serializing swagger to string (#532)

Co-authored-by: Levi Muriuki <muriukilm@upmc.edu>

src/APIM_ARMTemplate/apimtemplate/Creator/Utilities/OpenApi.cs

@@ -52,7 +52,8 @@ public string GetDefinition()
             }
             else
             {
-                return JsonConvert.SerializeObject(definition_);
+                // include StringEscaping to ensure single quotes are escaped
+                return JsonConvert.SerializeObject(definition_, settings: new JsonSerializerSettings { StringEscapeHandling = StringEscapeHandling.EscapeHtml});
             }
         }