Adjust when to drop packets per incoming interface for the RR scheduler

[mkhazraee]

To have control over buffer bloat, we can drop packets in the scheduler based on the available occupancy information to the scheduler. In Hash scheduler it's already being used, but for the RR scheduler it is based on the axis_dropper module which has a bug and right now the dropping feature is disabled.

[mkhazraee]

Marked the issue as bug, as the axis_dropper is buggy even though bypassed in the implementation.