Make signature of _setSize match that of the method it overrrides.
Make signature of _setSize match that of the method it overrrides.

It seems that if the name of the parameter matches pylint won't complain
about an unused argument.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

vojtechtrefny/blivet,rvykydal/blivet,jkonecny12/blivet,AdamWill/blivet,jkonecny12/blivet,rvykydal/blivet,rhinstaller/blivet,rhinstaller/blivet,dwlehman/blivet,AdamWill/blivet,vpodzime/blivet,vpodzime/blivet,vojtechtrefny/blivet,dwlehman/blivet