The second parameter of fip_id_cidrs requires a cidr, but now is address. this
causes function `_sync_and_remove_fip` fail to remove vip as expected.
if current is ha router, in function _sync_and_remove_fip will call
`ri._remove_vip(fip_id_cidr[1])`. the final parameter is passed to
KeepalivedInstance.remove_vip_by_ip_address and compare with attribute vips.
the values of vips are of type CIDR.
if not ha, the following process processing use netaddr.IPNetwork and can be
performed as expected.
Closes-bug: #1873708
Change-Id: I2ae2ade29700a56dc340256389bf8b0efd697ba4