fixed 4db82719 from https://gitee.com/quanli125/xts_acts/pulls/6764

fixed f3ae6d67 from https://gitee.com/quanli125/xts_acts/pulls/6763
quanli1@huawei.com
Signed-off-by: Nquanli <quanli1@huawei.com>

communication/bluetooth_ble/src/main/js/test/BleGattManager.test.js

@@ -125,6 +125,7 @@ describe('bluetoothBLETest', function() {
         console.info('[bluetooth_js] gattClient connect' + ret)
         expect(ret).assertTrue();
         gattClient.disconnect();
+        await sleep(2000);
         await gattClient.off("BLEConnectionStateChange");
         done()
    })