fixed interface controllers file name

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AspNetCoreServerCodegen.java

@@ -201,6 +201,16 @@ public String apiFileFolder() {
         return outputFolder + File.separator + sourceFolder + File.separator + packageName + File.separator + "Controllers";
     }
 
+    @Override
+    public String apiFilename(String templateName, String tag) {
+        boolean isInterface = templateName.equalsIgnoreCase("icontroller.mustache");
+        String suffix = apiTemplateFiles().get(templateName);
+        if (isInterface) {
+            return apiFileFolder() + "/I" + toApiFilename(tag) + suffix;
+        }
+        return apiFileFolder() + '/' + toApiFilename(tag) + suffix;
+    }
+
     @Override
     public String modelFileFolder() {
         return outputFolder + File.separator + sourceFolder + File.separator + packageName + File.separator  + "Models";

modules/swagger-codegen/src/main/resources/aspnetcore/icontroller.mustache

@@ -14,15 +14,13 @@ using {{packageName}}.Models;
     [Description("{{description}}")]{{/description}}
     public interface I{{classname}}Controller
     { {{#operation}}
-      {{#contents}}
         /// <summary>
         /// {{#summary}}{{summary}}{{/summary}}
         /// </summary>
         {{#notes}}/// <remarks>{{notes}}</remarks>{{/notes}}{{#parameters}}
         /// <param name="{{paramName}}">{{description}}</param>{{/parameters}}{{#responses}}
         /// <response code="{{code}}">{{message}}</response>{{/responses}}
         IActionResult {{operationId}}({{#parameters}}{{>pathParam}}{{>queryParam}}{{>bodyParam}}{{>formParam}}{{>headerParam}}{{#hasMore}}, {{/hasMore}}{{/parameters}});
-        {{/contents}}
         {{/operation}}
     }
 {{/operations}}