* DellEMC S6000, xcvrd support
* sleep 1 second to avoid busy looping
* removal of dead code
* Correct typo error to 1 second
* Introduced 1 second sleep
* Revamped script with blocking call support
* get_transceiver_change_event api definition update
* adding timeout support for get_transceiver_change_event
( All device-specific files now reside under /device directory in a <vendor-name>/<platform-string>/<hardware-SKU> directory structure in repo.
* Device-specific files are now packaged into a Debian package (sonic-device-data) and are now installed to /usr/share/sonic/device/<platform-string>/<hardware-SKU>/ directory on switch.
