Encode should be called only for strings

If not string provided as arg to print_to_output
it should not be encoded, and lets assume that proper unicode handling
will be done in custom print_method

Change-Id: If0c03571ccc7513fe85c38477ad9750ad9d82e97
Closes-Bug: #1330485

fuelclient/fuelclient/cli/serializers.py

@@ -61,6 +61,8 @@ class Serializer(object):
         if self.format_flags:
             self.print_formatted(formatted_data)
         else:
+            if isinstance(arg, unicode):
+                arg = arg.encode('utf-8')
             print_method(arg)
 
     def prepare_path(self, path):

fuelclient/tests/test_client.py

@@ -228,3 +228,13 @@ class TestDownloadUploadNodeAttributes(BaseTestCase):
         cmd = "node --node-id 1 --disk"
         self.run_cli_commands((self.download_command(cmd),
                               self.upload_command(cmd)))
+
+
+class TestDeployChanges(BaseTestCase):
+
+    def test_deploy_changes_no_failure(self):
+        self.load_data_to_nailgun_server()
+        env_create = "env create --name=test --release=1"
+        add_node = "--env-id=1 node set --node 1 --role=controller"
+        deploy_changes = "deploy-changes --env 1"
+        self.run_cli_commands((env_create, add_node, deploy_changes))