Add the parameter ``dnsmasq_dhcp_sequential_ip`` to the
ironic::inspector class. When true (the default) dnsmasq
is configured to serve addresses in sequential orders.
Some DHCPv6 clients don't operate well with a DHCP server
that serves addresses sequentially. The new parameter
allow disabling sequential addressing to improve
interoperability with DHCPv6 clients in UEFI firmware.
Closes-Bug: #1941908
Change-Id: Iad32434790a1744249b284937c6b67e9b58a235f
4f67b341ee