buildvm-s390x-zvm: disable linux-system-roles/networking for now

It seems it doesn't set the options needed by zvm systems to find their
network card. So, lets disable this for now and consult with upstream.

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

inventory/group_vars/buildvm_s390x_zvm

@@ -6,21 +6,21 @@ dns_search2: "fedoraproject.org"
 enc900_ipv4_gw: 10.16.0.254
 enc900_ipv4_nm: 24
 has_ipv4: yes
-network_connections:
-  - autoconnect: yes
-    ip:
-      address:
-        - "{{ enc900_ipv4_ip }}/{{ enc900_ipv4_nm }}"
-      dhcp4: no
-      dns:
-        - "{{ dns1 }}"
-        - "{{ dns2 }}"
-      dns_search:
-        - "{{ dns_search1 }}"
-        - "{{ dns_search2 }}"
-      gateway4: "{{ enc900_ipv4_gw }}"
-    mac: "{{ ansible_default_ipv4.macaddress }}"
-    name: enc900
-    state: up
-    type: ethernet
+#network_connections:
+#  - autoconnect: yes
+#    ip:
+#      address:
+#        - "{{ enc900_ipv4_ip }}/{{ enc900_ipv4_nm }}"
+#      dhcp4: no
+#      dns:
+#        - "{{ dns1 }}"
+#        - "{{ dns2 }}"
+#      dns_search:
+#        - "{{ dns_search1 }}"
+#        - "{{ dns_search2 }}"
+#      gateway4: "{{ enc900_ipv4_gw }}"
+#    mac: "{{ ansible_default_ipv4.macaddress }}"
+#    name: enc900
+#    state: up
+#    type: ethernet
 varnish_group: s390kojipkgs