tests: add missing test for Hinawa.FwReq.transaction_async() and transaction_sync()
tests: add missing test for Hinawa.FwReq.transaction_async() and transaction_sync()

Fixes: f2c41587c150 ("fw_req: add an API to complete transaction synchronously")
Fixes: 0982a8fca462 ("fw_req: add an API to initiate request subaction for transaction")
Signed-off-by: Takashi Sakamoto <d5ec7d0cd8074757a1f5eb708bc105c3065a65ea@sakamocchi.jp>

takaswie/libhinawa,takaswie/libhinawa