Add v2_only decorator to network aliases test

Signed-off-by: Joffrey F <joffrey@docker.com>

tests/acceptance/cli_test.py

@@ -445,6 +445,7 @@ class CLITestCase(DockerClientTestCase):
 
         assert networks[0]['Options']['com.docker.network.bridge.enable_icc'] == 'false'
 
+    @v2_only()
     def test_up_with_network_aliases(self):
         filename = 'network-aliases.yml'
         self.base_dir = 'tests/fixtures/networks'