Update headers for openstack router list --long

Updated External gateway info to External Gateway Info,
Availability zones to Availability Zones in the
openstack router list --long command to keep
syncronized with other Openstack commands headers

Change-Id: I5a0e9c736d63ebaa20204782ed646f5e4fe67a36
Closes-Bug: #1643868

openstackclient/network/v2/router.py

@@ -323,7 +323,7 @@ class ListRouter(command.Lister):
             )
             column_headers = column_headers + (
                 'Routes',
-                'External gateway info',
+                'External Gateway Info',
             )
             # availability zone will be available only when
             # router_availability_zone extension is enabled
@@ -332,7 +332,7 @@ class ListRouter(command.Lister):
                     'availability_zones',
                 )
                 column_headers = column_headers + (
-                    'Availability zones',
+                    'Availability Zones',
                 )
 
         data = client.routers(**args)

openstackclient/tests/unit/network/v2/test_router.py

@@ -324,12 +324,12 @@ class TestListRouter(TestRouter):
     )
     columns_long = columns + (
         'Routes',
-        'External gateway info',
-        'Availability zones'
+        'External Gateway Info',
+        'Availability Zones'
     )
     columns_long_no_az = columns + (
         'Routes',
-        'External gateway info',
+        'External Gateway Info',
     )
 
     data = []

releasenotes/notes/bug-1643868-421d5d8fd317d8b0.yaml

@@ -0,0 +1,7 @@
+---
+features:
+  - |
+    Updated the ``openstack router list --long`` headers as
+    ``External gateway info`` to ``External Gateway Info``
+    and ``Availability zones`` to ``Availability zones``
+    [Bug `1643868 <https://bugs.launchpad.net/bugs/1643868>`_]