
This reverts commit 7e1b8a7261d31208d853ecfa255da648ba54b656. openstacksdk >=0.19.0 fixes the filtering problems leading to all ports being deleted. However openstacksdk <0.21.0 has problems with dogpile.cache so use 0.21.0 as a minimum. Change-Id: Id642d074cbb645ced5342dda4a1c89987c91a8fc