Change openqa-x86-worker04 networking to use biosdevname names

Old-style names aren't consistent. biosdevname wasn't working
because it wasn't installed, I've installed it now.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

inventory/host_vars/openqa-x86-worker04.iad2.fedoraproject.org

@@ -1,9 +1,9 @@
 ---
 freezes: false
-# eth0 is default network
-# eth1 is disabled/nothing
-# eth2 is disabled/nothing
-# eth3 is disabled/nothing
+# em1 is default network
+# em2 is disabled/nothing
+# em3 is disabled/nothing
+# em4 is disabled/nothing
 # NOTE network configuration beyond the scope of linux-system-roles on
 # this host is performed by the openqa/worker role
 
@@ -22,27 +22,27 @@ dns_search2: "fedoraproject.org"
 
 has_ipv4: yes
 
-eth0_ipv4: 10.3.174.24
-eth0_ipv4_nm: 24
-eth0_ipv4_gw: 10.3.174.254
-eth0_mac: "{{ mac1 }}"
+em1_ipv4: 10.3.174.24
+em1_ipv4_nm: 24
+em1_ipv4_gw: 10.3.174.254
+em1_mac: "{{ mac1 }}"
 
-eth1_mac: "{{ mac2 }}"
+em2_mac: "{{ mac2 }}"
 
-eth2_mac: "{{ mac3 }}"
+em3_mac: "{{ mac3 }}"
 
-eth3_mac: "{{ mac4 }}"
+em4_mac: "{{ mac4 }}"
 
 network_connections:
-- name: eth0
-  mac: "{{ eth0_mac }}"
+- name: em1
+  mac: "{{ em1_mac }}"
   state: up
   type: ethernet
   autoconnect: yes
   ip:
     address:
-    - "{{ eth0_ipv4 }}/{{ eth0_ipv4_nm }}"
-    gateway4: "{{ eth0_ipv4_gw }}"
+    - "{{ em1_ipv4 }}/{{ em1_ipv4_nm }}"
+    gateway4: "{{ em1_ipv4_gw }}"
     dns:
     - "{{ dns1 }}"
     - "{{ dns2 }}"
@@ -51,18 +51,18 @@ network_connections:
     - "{{ dns_search2 }}"
     dhcp4: no
     auto6: no
-- name: eth1
-  mac: "{{ eth1_mac }}"
+- name: em2
+  mac: "{{ em2_mac }}"
   state: down
   type: ethernet
   autoconnect: no
-- name: eth2
-  mac: "{{ eth2_mac }}"
+- name: em3
+  mac: "{{ em3_mac }}"
   state: down
   type: ethernet
   autoconnect: no
-- name: eth3
-  mac: "{{ eth3_mac }}"
+- name: em4
+  mac: "{{ em4_mac }}"
   state: down
   type: ethernet
   autoconnect: no
@@ -72,7 +72,7 @@ nrpe_procs_crit: 1600
 
 sudoers: "{{ private }}/files/sudo/qavirt-sudoers"
 
-openqa_tap_iface: eth0
+openqa_tap_iface: em1
 
 # Has a hardware RNG
 openqa_rngd: true