Allow display project-id for server groups

Currently, the display of server groups doesn't contain informations
about project-id. It is very difficult for admin to tell which
group belongs to which project when using command:
"nova server-group-list --all-projects".

This patch adds project-id to the display.

Change-Id: I010bf02f696396c404bc7a51ce93252c8c7f68a6
Partial-bug:#1481210

novaclient/tests/unit/v2/test_shell.py

@@ -2471,7 +2471,8 @@ class ShellTest(utils.TestCase):
         self.run_command('server-group-create wjsg affinity')
         self.assert_called('POST', '/os-server-groups',
                            {'server_group': {'name': 'wjsg',
-                                             'policies': ['affinity']}})
+                                             'policies': ['affinity']}},
+                           pos=0)
 
     def test_delete_multi_server_groups(self):
         self.run_command('server-group-delete 12345 56789')

novaclient/v2/shell.py

@@ -4422,7 +4422,13 @@ def do_availability_zone_list(cs, _args):
 
 
 def _print_server_group_details(server_group):
-    columns = ['Id', 'Name', 'Policies', 'Members', 'Metadata']
+    # This is for compatible with Nova v2 API, remove after v2
+    # is dropped.
+    if hasattr(server_group, 'project_id'):
+        columns = ['Id', 'Name', 'Project_id', 'Policies',
+                   'Members', 'Metadata']
+    else:
+        columns = ['Id', 'Name', 'Policies', 'Members', 'Metadata']
     utils.print_list(server_group, columns)