TVD: fix project plugin OSC to display errors

The project plugin mapping used by the TVD plugin uses the openstack
client for configration by the admin user.
This patch catches the plugin exceptions to make sure the user sees
the error.

Change-Id: I8dce5e1daf2d0c4796c53e831b81462b27e8bc9c

vmware_nsx/osc/v2/project_plugin_map.py

@@ -13,10 +13,14 @@
 
 """Project Plugin mapping action implementations"""
 
+import six
+
+from openstack import exceptions as os_exceptions
 from openstack.network import network_service
 from openstack import resource
 from openstackclient.i18n import _
 from osc_lib.command import command
+from osc_lib import exceptions as osc_exceptions
 from osc_lib import utils
 
 project_plugin_maps_path = "/project-plugin-maps"
@@ -82,7 +86,13 @@ class CreateProjectPluginMap(command.ShowOne):
     def take_action(self, parsed_args):
         client = self.app.client_manager.network
         attrs = _get_attrs(parsed_args)
-        obj = client._create(ProjectPluginMap, **attrs)
+        try:
+            obj = client._create(ProjectPluginMap, **attrs)
+        except os_exceptions.HttpException as exc:
+            msg = _("Error while executing command: %s") % exc.message
+            if exc.details:
+                msg += ", " + six.text_type(exc.details)
+            raise osc_exceptions.CommandError(msg)
         display_columns, columns = _get_columns(obj)
         data = utils.get_item_properties(obj, columns, formatters={})
         return (display_columns, data)