Override the default for DIB_DHCP_NETWORK_MANAGER_AUTO
to `true` on RHEL and CentOS release 8 and later.
The dhcp-all-interfaces element is configured to only
apply NetworkManager configuration. The service:
dhcp-all-interfaces will not be enabled. Not enabling the
service allows NetworkManager to do the interface auto-
configuration. In release 8 and later it should do this
just as good, or even better, compared to the
dhcp-all-interfaces.sh script.
Depends-On: Id6f8d6aaaf52a78175bb6c065ec88274c364834e
Change-Id: I12950733bfe54cae62d299b4c5987449d551857a
(cherry picked from commit bdb387bb84e0bbb3f7de79814c39fa0d42d52908)
ace5bbf3f4