Add multi-asic support for sonic-clear queue wredcounters and counterpoll , --nonzero support for show queue wredcounters (#4012)

* Add multi-asic support for sonic-clear queue wredcounters

Signed-off-by: saksarav <sakthivadivu.saravanaraj@nokia.com>

* Add multi-asic support for counterpoll cli commands

Signed-off-by: saksarav <sakthivadivu.saravanaraj@nokia.com>

* Add --nonzero option for show queue wredcounters

Signed-off-by: saksarav <sakthivadivu.saravanaraj@nokia.com>

* Add Unit test cases for code coverage

Signed-off-by: saksarav <sakthivadivu.saravanaraj@nokia.com>

* Fix the  syslog error seen in pizza box

Signed-off-by: saksarav <sakthivadivu.saravanaraj@nokia.com>

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Signed-off-by: saksarav <sakthivadivu.saravanaraj@nokia.com>

Author: saksarav-nokia