fixes aspnetcore controller when no security defined in spec

Author: frantuma

src/main/resources/handlebars/aspnetcore/2.1/controller.mustache

@@ -7,7 +7,7 @@ using Swashbuckle.AspNetCore.SwaggerGen;
 using Newtonsoft.Json;
 using System.ComponentModel.DataAnnotations;
 using {{packageName}}.Attributes;
-using {{packageName}}.Security;
+{{#hasAuthMethods}}using {{packageName}}.Security;{{/hasAuthMethods}}
 using Microsoft.AspNetCore.Authorization;
 using {{modelPackage}};
 

src/main/resources/handlebars/aspnetcore/Startup.mustache

@@ -11,7 +11,7 @@ using Newtonsoft.Json.Serialization;
 using Swashbuckle.AspNetCore.Swagger;
 using Swashbuckle.AspNetCore.SwaggerGen;
 using {{packageName}}.Filters;
-using {{packageName}}.Security;
+{{#hasAuthMethods}}using {{packageName}}.Security;{{/hasAuthMethods}}
 
 using Microsoft.AspNetCore.Authentication;
 

src/main/resources/handlebars/aspnetcore/controller.mustache

@@ -14,7 +14,7 @@ using Swashbuckle.AspNetCore.SwaggerGen;
 using Newtonsoft.Json;
 using System.ComponentModel.DataAnnotations;
 using {{packageName}}.Attributes;
-using {{packageName}}.Security;
+{{#hasAuthMethods}}using {{packageName}}.Security;{{/hasAuthMethods}}
 using {{packageName}}.Models;
 
 namespace {{packageName}}.Controllers