[platform-daemons] pcied daemon doesn't work

[bratashX]

Description

Steps to reproduce the issue:

1. Deploy SONiC.HEAD.748
2. Execute
   docker exec pmon supervisorctl status
3. Wait one minute
4. Execute
   docker exec pmon supervisorctl status

Describe the results you received:
pmon daemon restarts every minute.

Additional information you deem important (e.g. issue happens only occasionally):

pmon daemon execute pcieutil, but pcieutil is absent in pmon container.
https://github.com/Azure/sonic-platform-daemons/blob/415b8c457625c514aff0f8ecbdbbb655414d8067/sonic-pcied/scripts/pcied#L57

INFO pmon#supervisord: pcied Traceback (most recent call last):
INFO pmon#supervisord: pcied File "/usr/local/bin/pcied", line 129, in
INFO pmon#supervisord: pcied main()
INFO pmon#supervisord: pcied File "/usr/local/bin/pcied", line 126, in main
INFO pmon#supervisord: pcied pcied.run()
INFO pmon#supervisord: pcied File "/usr/local/bin/pcied", line 110, in run
INFO pmon#supervisord: pcied self.check_pcie_devices()
INFO pmon#supervisord: pcied File "/usr/local/bin/pcied", line 58, in check_pcie_devices
INFO pmon#supervisord: pcied p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
INFO pmon#supervisord: pcied File "/usr/lib/python2.7/subprocess.py", line 394, in init
INFO pmon#supervisord: pcied errread, errwrite)
INFO pmon#supervisord: pcied File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
INFO pmon#supervisord: pcied raise child_exception
INFO pmon#supervisord: pcied OSError: [Errno 2] No such file or directory

[lguohan]

@sujinmkang, any update on this?

[sujinmkang]

@lguohan I just noticed this issue and am looking into it. I will update this issue soon.

[bratashX]

Bug fixed.