Description

1. We've ported / tested OK / PRed sfputil.py ([Accton AS7816-64X] Add new platform and device for AS7816-64X. #1260 ) based on the Porting Guilde
   **##### https://github.com/Azure/SONiC/wiki/Porting-Guide
   sfputil.py: Format: Python module that must implement the class SfpUtil which must inherit from sonic_sfp.sfputilbase.SfpUtilBase which communicates with your SFP device driver
   psuutil.py: Format: Python module that must implement the class PsuUtil which must inherit from sonic_psu.psu_base.PsuBase which communicates with your PSU device driver

2. We found that sfputil show even sfputil version was not working under the build image with the commit: e18bffd

3. After examining the sonic-utilities PRs, we found that sonic_sfp together with sonic_psu were removed from its setup.py at its Added profile.ini into docker-syncd-cavm #184 (Remove platform-specific hardware plugin packages; They have been moved to sonic-platform-common repo sonic-utilities#184)
   #####
   $ dpkg --contents ./debs/python-sonic-utilities_1.2-1_all.deb | grep sonic_sfp
   $ [NO FOUND]
   #####

Steps to reproduce the issue:

1. list the sfputil.py (ls -al)
2. Issue sfputil version
3. Issue sfputil show

Describe the results you received:
root@sonic:/# ls -al ./usr/share/sonic/device/x86_64-accton_as7816_64x-r0/plugin/sfputil.py
-rw-r--r-- 1 root root 3611 Feb 27 2018 ./usr/share/sonic/device/x86_64-accton_as7816_64x-r0/plugins/sfputil.py
root@sonic:/# sfputil version
Failed to load platform module 'sfputil': [Errno 2] No such file or directory
root@sonic:/# sfputil show
Failed to load platform module 'sfputil': [Errno 2] No such file or directory

Describe the results you expected:

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

**Output of `show version`:**

root@sonic:/home/admin# show version
SONiC Software Version: SONiC.HEAD.0-dirty-20180227.062038
Distribution: Debian 8.10
Kernel: 3.16.0-5-amd64
Build commit: e18bffd
Build date: Tue Feb 27 06:27:54 UTC 2018

**Attach debug file `sudo generate_dump`:**

sonic_dump_sonic_20000101_000542.tar.gz