network.interface: Fix ifup OVS port with route

This change attempts to fix the following sequence for nodes with
OVS ports that also have routes defined:
- state.sls linux.network; system.reboot; state.sls linux.network;

If an OVS port also has a route defined, a route cfg file is
created in </etc/network/if.{down,up}.d/>, which is sourced after
system reboot before we (eventually) re-run `interface.sls`, leaving
the OVS port in UP state, so `ifup` would fail.

Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

linux/network/interface.sls

@@ -146,6 +146,8 @@ ovs_port_up_{{ interface_name }}:
     - file: ovs_port_{{ interface_name }}_line2
     - openvswitch_bridge: ovs_bridge_{{ interface.bridge }}
     - file: linux_interfaces_final_include
+  - unless:
+    - ip link show {{ interface_name }} | grep -q '\<UP\>'
 
 {%- endif %}