Fix and improved bootstrap jobs module test.

On O.S. with different language than english the BadTlsConfig source error message will differ from the compared one.
This will fix this issue by matching the enum itself instead of relying on a string compare.

Author: GGLinnk

src/bootstrap/jobs/mod.rs

@@ -50,7 +50,7 @@ mod tests {
     use camino::Utf8PathBuf;
     use torrust_tracker_configuration::TslConfig;
 
-    use super::make_rust_tls;
+    use super::{make_rust_tls, Error};
 
     #[tokio::test]
     async fn it_should_error_on_bad_tls_config() {
@@ -65,9 +65,7 @@ mod tests {
         .expect("tls_was_enabled")
         .expect_err("bad_cert_and_key_files");
 
-        assert!(err
-            .to_string()
-            .contains("bad tls config: No such file or directory (os error 2)"));
+        assert!(matches!(err, Error::BadTlsConfig { source: _ }));
     }
 
     #[tokio::test]
@@ -83,7 +81,7 @@ mod tests {
         .expect("tls_was_enabled")
         .expect_err("missing_config");
 
-        assert_eq!(err.to_string(), "tls config missing");
+        assert!(matches!(err, Error::MissingTlsConfig { location: _ }));
     }
 }