fix: Ensure the ready inner service is used

Cloning the inner service to use in call can mean a not-ready clone gets
used which violates the tower service preconditions. Replace the cloned
service with the ready service to ensure the right copy gets used. See
https://docs.rs/tower/0.4.13/tower/trait.Service.html#be-careful-when-cloning-inner-services
for more details

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>

jwt-authorizer/src/layer.rs

@@ -342,6 +342,9 @@ where
 
     fn call(&mut self, req: Request<ReqBody>) -> Self::Future {
         let inner = self.inner.clone();
+        // take the service that was ready
+        let inner = std::mem::replace(&mut self.inner, inner);
+
         let auth_fut = self.authorize(req);
 
         ResponseFuture {