[Linux] Add variables for installing FusionOS with static IP address

[keirazhang]

Added below 4 variables to configure static IP at deploy_vm for FusionOS.

# ethernet0_ipv4_addr: 192.168.1.10
# ethernet0_gateway: 192.168.1.1
# ethernet0_netmask: 255.255.255.0
# ethernet0_nameservers: 192.168.1.1,192.168.1.2

After autoinstall completes, the network interface is successfully configured with static IP:

Nameservers are set:

# cat /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
IPADDR=x.x.x.x
PREFIX=20
GATEWAY=x.x.x.x
DNS1=x.x.x.x
DNS2=x.x.x.x
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=e3d3aa8b-76ad-4104-b06e-8ed5e1e12245
DEVICE=ens33
ONBOOT=yes

Nameservers are not set:

# cat /etc/sysconfig/network-scripts/ifcfg-ens33 
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=none
IPADDR=x.x.x.x
PREFIX=20
GATEWAY=x.x.x.x
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=0f031a4f-0f06-4537-bd5a-97d44f7a80f2
DEVICE=ens33
ONBOOT=yes

[linhuali]

LGTM, thanks a lot!