Fix service discovery in functional tests

If a required service is not enabled then we skip the test.
The discovery is done by tests/functional/base.py:is_service_enabled
but this method is broken, credentials are not passed to the
'openstack service show' command so every call will fail and every test
that relies on it will be skipped. This commit fixed that method and
the issues that popped up when re-enabling tests.

Network segment range:
 - issue where we assumed network-segment-range extension is always
   present
 - issue where we compare integers and string representations of numbers

Subnet:
 - issue where we try to deepcopy an uncopyable object in UnsetSubnet

Change-Id: Id3cc907c1ed2a25b49cf6f4a7233e0401a02383a
Story: 2005169
Task: 29908
(cherry picked from commit 7741347041b078ca4d687597897194d7797d202d)

1 files changed, 10 insertions, 9 deletions

diff --git a/openstackclient/network/v2/subnet.py b/openstackclient/network/v2/subnet.py
index 5f8113bb..0733f37c 100644
--- a/openstackclient/network/v2/subnet.py
+++ b/openstackclient/network/v2/subnet.py
@@ -681,29 +681,30 @@ class UnsetSubnet(command.Command):
     def take_action(self, parsed_args):
         client = self.app.client_manager.network
         obj = client.find_subnet(parsed_args.subnet, ignore_missing=False)
-        tmp_obj = copy.deepcopy(obj)
+
         attrs = {}
         if parsed_args.dns_nameservers:
-            _update_arguments(tmp_obj.dns_nameservers,
+            attrs['dns_nameservers'] = copy.deepcopy(obj.dns_nameservers)
+            _update_arguments(attrs['dns_nameservers'],
                               parsed_args.dns_nameservers,
                               'dns-nameserver')
-            attrs['dns_nameservers'] = tmp_obj.dns_nameservers
         if parsed_args.host_routes:
+            attrs['host_routes'] = copy.deepcopy(obj.host_routes)
             _update_arguments(
-                tmp_obj.host_routes,
+                attrs['host_routes'],
                 convert_entries_to_nexthop(parsed_args.host_routes),
                 'host-route')
-            attrs['host_routes'] = tmp_obj.host_routes
         if parsed_args.allocation_pools:
-            _update_arguments(tmp_obj.allocation_pools,
+            attrs['allocation_pools'] = copy.deepcopy(obj.allocation_pools)
+            _update_arguments(attrs['allocation_pools'],
                               parsed_args.allocation_pools,
                               'allocation-pool')
-            attrs['allocation_pools'] = tmp_obj.allocation_pools
+
         if parsed_args.service_types:
-            _update_arguments(tmp_obj.service_types,
+            attrs['service_types'] = copy.deepcopy(obj.service_types)
+            _update_arguments(attrs['service_types'],
                               parsed_args.service_types,
                               'service-type')
-            attrs['service_types'] = tmp_obj.service_types
         if attrs:
             client.update_subnet(obj, **attrs)