[Rust] rename rust2 to rust-server (#6747)

* rename rust2 to rust-server

* update rust-server batch file to use petstore test spec

modules/swagger-codegen/src/main/resources/rust-server/example-client.mustache

@@ -0,0 +1,59 @@
+#![allow(missing_docs, unused_variables, trivial_casts)]
+
+extern crate {{externCrateName}};
+#[allow(unused_extern_crates)]
+extern crate futures;
+#[allow(unused_extern_crates)]
+extern crate swagger;
+#[allow(unused_extern_crates)]
+extern crate uuid;
+extern crate clap;
+
+#[allow(unused_imports)]
+use futures::{Future, future, Stream, stream};
+#[allow(unused_imports)]
+use {{externCrateName}}::{ApiNoContext, ContextWrapperExt,
+                      ApiError{{#apiInfo}}{{#apis}}{{#operations}}{{#operation}},
+                      {{operationId}}Response{{/operation}}{{/operations}}{{/apis}}{{/apiInfo}}
+                     };
+use clap::{App, Arg};
+
+fn main() {
+    let matches = App::new("client")
+        .arg(Arg::with_name("operation")
+            .help("Sets the operation to run")
+            .possible_values(&[
+{{#apiInfo}}{{#apis}}{{#operations}}{{#operation}}{{#vendorExtensions}}{{^noClientExample}}    "{{operationId}}",
+{{/noClientExample}}{{/vendorExtensions}}{{/operation}}{{/operations}}{{/apis}}{{/apiInfo}}])
+            .required(true)
+            .index(1))
+        .arg(Arg::with_name("https")
+            .long("https")
+            .help("Whether to use HTTPS or not"))
+        .get_matches();
+
+    let client = if matches.is_present("https") {
+        // Using Simple HTTPS
+        {{externCrateName}}::Client::try_new_https("https://localhost:{{serverPort}}", "examples/ca.pem").expect("Failed to create HTTPS client")
+    } else {
+        // Using HTTP
+        {{externCrateName}}::Client::try_new_http("http://localhost:{{serverPort}}").expect("Failed to create HTTP client")
+    };
+
+    // Using a non-default `Context` is not required; this is just an example!
+    let client = client.with_context({{externCrateName}}::Context::new_with_span_id(self::uuid::Uuid::new_v4().to_string()));
+
+    match matches.value_of("operation") {
+{{#apiInfo}}{{#apis}}{{#operations}}{{#operation}}
+        {{#vendorExtensions}}{{#noClientExample}}// Disabled because there's no example.
+        // {{/noClientExample}}Some("{{operationId}}") => {
+        {{#noClientExample}}// {{/noClientExample}}    let result = client.{{operation_id}}{{/vendorExtensions}}({{#allParams}}{{^-first}}, {{/-first}}{{#vendorExtensions}}{{{example}}}{{/vendorExtensions}}{{/allParams}}).wait();
+        {{#vendorExtensions}}{{#noClientExample}}// {{/noClientExample}}{{/vendorExtensions}}    println!("{:?} (X-Span-ID: {:?})", result, client.context().x_span_id.clone().unwrap_or(String::from("<none>")));
+        {{#vendorExtensions}}{{#noClientExample}}// {{/noClientExample}}{{/vendorExtensions}} },
+{{/operation}}{{/operations}}{{/apis}}{{/apiInfo}}
+        _ => {
+            panic!("Invalid operation provided")
+        }
+    }
+}
+