Make way to get values.

src/diagnostic_status.rs

@@ -85,6 +85,10 @@ impl DiagnosticStatus {
         self.hardware_id.clone()
     }
 
+    pub fn values(&self) -> BTreeMap<String, String> {
+        self.values.clone()
+    }
+
     pub fn keys(&self) -> Vec<String> {
         self.values.keys().cloned().collect()
     }