test, bluetooth: suspend on unit-tests

[yorkie]

• Version: master
• Platform: all
• Subsystem: bluetooth, test

The below is the pending logs about bluetooth:

13:38:44 2019-05-22T05:38:43.479Z [INFO] <bluetooth-a2dp> disconnect() while last state is not connected.
13:38:44 2019-05-22T05:38:43.506Z [INFO] <bluetooth-a2dp> close() while last state is already closed.
13:38:44 2019-05-22T05:38:43.641Z [INFO] <bluetooth-a2dp> connect() while last state is not opened.
13:38:44 2019-05-22T05:38:43.684Z [INFO] <bluetooth-a2dp> disconnect() while last state is not connected.
13:38:44 2019-05-22T05:38:43.730Z [INFO] <bluetooth-a2dp> discovery() while last state is not opened.
13:38:44 2019-05-22T05:38:43.773Z [INFO] <bluetooth-a2dp> close() while last state is already closed.

[PixMod]

Please note the bluetooth-a2dp belongs to yoda-runtime/packages. So it is not suitable to transfer issue to here.

[legendecas]

@Morrowind you may transfer it back to yodart if you don't think it's related to the app.