dns: add 'dns_dnsmasq_driver_removal' test
Check that NM doesn't crash when veth driver is removed after con is up with dns=dnsmasq settings enabled.
https://bugzilla.redhat.com/show_bug.cgi?id=1628576
@Build:nm-1-12
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Check that NM doesn't crash when veth driver is removed after con is up with dns=dnsmasq settings enabled.
https://bugzilla.redhat.com/show_bug.cgi?id=1628576
@Build:nm-1-12