Add virt.network_get_xml function

Users may want to see the full XML definition of a network.

salt/modules/virt.py

@@ -4584,6 +4584,30 @@ def _net_get_leases(net):
     return result
 
 
+def network_get_xml(name, **kwargs):
+    '''
+    Return the XML definition of a virtual network
+
+    :param name: libvirt network name
+    :param connection: libvirt connection URI, overriding defaults
+    :param username: username to connect with, overriding defaults
+    :param password: password to connect with, overriding defaults
+
+    .. versionadded:: Neon
+
+    CLI Example:
+
+    .. code-block:: bash
+
+        salt '*' virt.network_get_xml default
+    '''
+    conn = __get_conn(**kwargs)
+    try:
+        return conn.networkLookupByName(name).XMLDesc()
+    finally:
+        conn.close()
+
+
 def network_start(name, **kwargs):
     '''
     Start a defined virtual network.

tests/unit/modules/test_virt.py

@@ -2348,6 +2348,16 @@ def test_network_info_notfound(self):
         net = virt.network_info('foo')
         self.assertEqual({}, net)
 
+    def test_network_get_xml(self):
+        '''
+        Test virt.network_get_xml
+        '''
+        network_mock = MagicMock()
+        network_mock.XMLDesc.return_value = '<net>Raw XML</net>'
+        self.mock_conn.networkLookupByName.return_value = network_mock
+
+        self.assertEqual('<net>Raw XML</net>', virt.network_get_xml('default'))
+
     def test_pool(self):
         '''
         Test virt._gen_pool_xml()