refactor StatSum to use RSRParsers and add conn_status converter

general_tests/offline_internal_apis_it_test.go

@@ -112,7 +112,7 @@ func TestOfflineInternalAPIsDumpDataDB(t *testing.T) {
 		} else if files != 42 {
 			t.Errorf("expected 42 files, received <%d>", files)
 		}
-		if totalSize < 35500 || totalSize > 35700 {
+		if totalSize < 35600 || totalSize > 35800 {
 			t.Errorf("expected folder size to be within range 35500KB to 35700KB, received <%v>KB", totalSize)
 		}
 	})