Add context to the object-interface methods.

Make necessary changes to xl fs azure sia

cmd/healthcheck-handler.go

@@ -51,7 +51,7 @@ func LivenessCheckHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	// List buckets is unsuccessful, means server is having issues, send 503 service unavailable
-	if _, err := objLayer.ListBuckets(); err != nil {
+	if _, err := objLayer.ListBuckets(nil); err != nil {
 		writeResponse(w, http.StatusServiceUnavailable, nil, mimeNone)
 		return
 	}