[Feature Request] support el7 wifi related interface configuration

[jhoblitt]

On redhat/el7 there a numerous parameters associated with configuring wifi. E.g.:

ESSID=foo
MODE=Managed
KEY_MGMT=WPA-PSK
SECURITYMODE=open
MAC_ADDRESS_RANDOMIZATION=default
TYPE=Wireless
IEEE_8021X_EAP_METHODS=PEAP
IEEE_8021X_IDENTITY=bob
IEEE_8021X_INNER_AUTH_METHODS=MSCHAPV2

There is also a per interface /etc/sysconfig/network-scripts/keys-<iface> file for secrets. E.g.:

IEEE_8021X_PASSWORD=...