ipdb: return `ipdb.common` as deprecated
ipdb: return `ipdb.common` as deprecated

Not to break the kuryr code.

Bug-Url: https://github.com/svinota/pyroute2/issues/228
Bug-Url: https://github.com/svinota/pyroute2/issues/231
Bug-Url: https://review.openstack.org/#/c/303630/

roolebo/pyroute2,roolebo/pyroute2