bandwidthcontroller: brute-force cleanup to catch costly_<iface> chains.

To help with development, where re-enable is used as a cleanup mechanism
we no remove ALL user chains.
Normally we only expect
  costly, penalty_box, and costly_<iface>.
If in the future we have more chains outside of those, this will need
revisiting.

Change-Id: I45e504bc1fe4ad973c00308967a474c73e959666
1 file changed