This fix is in 2019-03-04-01.1 puddle, not 2019-03-01-01.1.
Verified: Environment: os-net-config-8.4.3-6.el7ost.noarch Was able to successfully deploy the overcloud (and later upgrade the undercloud and thus the os-net-config to os-net-config-9.2.1-0.20190117181409.el7ost.noarch)
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:0448