fix fileinfo serialize

ecstore/src/erasure.rs

@@ -94,7 +94,7 @@ impl Erasure {
                         }
                     }
 
-                    warn!("Erasure encode errs {:?}", &errs);
+                    debug!("Erasure encode errs {:?}", &errs);
 
                     let none_count = errs.iter().filter(|&x| x.is_none()).count();
                     if none_count >= write_quorum {

ecstore/src/store_api.rs

@@ -27,7 +27,7 @@ pub struct FileInfo {
     pub fresh: bool, // indicates this is a first time call to write FileInfo.
     pub parts: Vec<ObjectPartInfo>,
     pub is_latest: bool,
-    #[serde(skip_serializing_if = "Option::is_none", default)]
+    // #[serde(skip_serializing_if = "Option::is_none", default)]
     pub tags: Option<HashMap<String, String>>,
     pub metadata: Option<HashMap<String, String>>,
     pub num_versions: usize,