Instance: show network info even if name is empty

Previously, when a network name is an empty string,
network information of server interfaces will be empty,
so we cannot distinguish server interfaces.

Also network name in the instance detail page is capitalized
but there is no need to capitalize it and such information like
network name should be displayed as-is. This is not directly
related to the bug fixed by this commit, but it is simple enough
and related to network name, so I believe it is okay.

Change-Id: I2f2ad9b6bf50a2b53e79e4929d877111f875bd5b
Closes-Bug: #1805812

openstack_dashboard/api/neutron.py

@@ -1735,7 +1735,8 @@ def servers_update_addresses(request, servers, all_tenants=False):
         ports_floating_ips[fip.port_id].append(fip)
 
     # Map network id to its name
-    network_names = dict(((network.id, network.name) for network in networks))
+    network_names = dict((network.id, network.name_or_id)
+                         for network in networks)
 
     for server in servers:
         try:

openstack_dashboard/dashboards/project/instances/templates/instances/_detail_overview.html

@@ -69,7 +69,7 @@
     <hr class="header_rule">
     <dl class="dl-horizontal">
       {% for network, ip_list in instance.addresses.items %}
-        <dt>{{ network|title }}</dt>
+        <dt>{{ network }}</dt>
         <dd>
           {% for ip in ip_list %}
             {% if not forloop.last %}{{ ip.addr }},&nbsp;{% else %}{{ ip.addr }}{% endif %}