Add Network mtu and port_security_enabled properties

Explicitly parse the mtu and port_security_enabled properties
for a Network object based on the property definitions in the
networking v2 API [1].

[1] http://developer.openstack.org/api-ref-networking-v2-ext.html

Change-Id: I45fa298e86afa31c7d63762dca004d14692def31

openstack/network/v2/network.py

@@ -56,6 +56,13 @@ class Network(resource.Resource):
     status = resource.prop('status')
     #: The associated subnets.
     subnets = resource.prop('subnets')
+    #: Read-only. The maximum transmission unit (MTU) of the network resource.
+    mtu = resource.prop('mtu', type=int)
+    #: The port security status, which is enabled ``True`` or disabled
+    #: ``False``. *Type: bool* *Default: False*
+    is_port_security_enabled = resource.prop('port_security_enabled',
+                                             type=bool,
+                                             default=False)
 
     def is_external(self):
         if self.router_external is not None:

openstack/tests/unit/network/v2/test_network.py

@@ -28,6 +28,8 @@ EXAMPLE = {
     'shared': True,
     'status': '11',
     'subnets': '12',
+    'mtu': 1400,
+    'port_security_enabled': True,
 }
 
 
@@ -62,6 +64,9 @@ class TestNetwork(testtools.TestCase):
         self.assertEqual(EXAMPLE['shared'], sot.shared)
         self.assertEqual(EXAMPLE['status'], sot.status)
         self.assertEqual(EXAMPLE['subnets'], sot.subnets)
+        self.assertEqual(EXAMPLE['mtu'], sot.mtu)
+        self.assertEqual(EXAMPLE['port_security_enabled'],
+                         sot.is_port_security_enabled)
 
     def test_external(self):
         sot = network.Network(EXAMPLE)