Azure requires VMs to attempt DHCP for at least 300 seconds during
provisioning. Setting ipv4.dhcp-timeout and ipv6.dhcp-timeout to
2147483647 (NetworkManager's value for infinity) allows indefinite
retries, which is robust than fixed timeout value. Both IPv4 and IPv6
are configured to prepare for IPv6-only scenarios.
Signed-off-by: Bala Konda Reddy M <bala12352@gmail.com>
