[rust-server] Always derive Debug (#1404)

* Add test for file response

* Always derive Debug

Now that we're using a byte array, we can guarantee that deriving Debug will always work

samples/server/petstore/rust-server/output/rust-server-test/examples/client.rs

@@ -21,6 +21,7 @@ use rust_server_test::{ApiNoContext, ContextWrapperExt,
                       ApiError,
                       DummyGetResponse,
                       DummyPutResponse,
+                      FileResponseGetResponse,
                       HtmlPostResponse
                      };
 use clap::{App, Arg};
@@ -32,6 +33,7 @@ fn main() {
             .possible_values(&[
     "DummyGet",
     "DummyPut",
+    "FileResponseGet",
     "HtmlPost",
 ])
             .required(true)
@@ -83,6 +85,11 @@ fn main() {
             println!("{:?} (X-Span-ID: {:?})", result, (client.context() as &Has<XSpanIdString>).get().clone());
          },
 
+        Some("FileResponseGet") => {
+            let result = core.run(client.file_response_get());
+            println!("{:?} (X-Span-ID: {:?})", result, (client.context() as &Has<XSpanIdString>).get().clone());
+         },
+
         Some("HtmlPost") => {
             let result = core.run(client.html_post("body_example".to_string()));
             println!("{:?} (X-Span-ID: {:?})", result, (client.context() as &Has<XSpanIdString>).get().clone());

samples/server/petstore/rust-server/output/rust-server-test/examples/server_lib/server.rs

@@ -13,6 +13,7 @@ use swagger::{Has, XSpanIdString};
 use rust_server_test::{Api, ApiError,
                       DummyGetResponse,
                       DummyPutResponse,
+                      FileResponseGetResponse,
                       HtmlPostResponse
 };
 use rust_server_test::models;
@@ -44,6 +45,13 @@ impl<C> Api<C> for Server<C> where C: Has<XSpanIdString>{
         Box::new(futures::failed("Generic failure".into()))
     }
 
+    /// Get a file
+    fn file_response_get(&self, context: &C) -> Box<Future<Item=FileResponseGetResponse, Error=ApiError>> {
+        let context = context.clone();
+        println!("file_response_get() - X-Span-ID: {:?}", context.get().0.clone());
+        Box::new(futures::failed("Generic failure".into()))
+    }
+
     /// Test HTML handling
     fn html_post(&self, body: String, context: &C) -> Box<Future<Item=HtmlPostResponse, Error=ApiError>> {
         let context = context.clone();