Add support for Python 3

Porting to Python3 using Openstack guidelines:
https://wiki.openstack.org/wiki/Python3

This passes unittests on Python 3.5 and passes opnfv_smoke suite

Updates:
   use six for urlparse and urlopen
   fix exception.message attribute removal
   run unittests on python3
   use unitest.mock on python 3
   fix open mock for vsperf
   fix float division by using delta/eplison comparison
   use unicode in StringIO
   use plugin/sample_config.yaml relative path from test case
   fixed apexlake unittests
   upgraded to mock 2.0.0 to match python3 unittest.mock features
   fixed flake8 issues
   implement safe JSON decode with oslo_serialization.jsonutils.dump_as_bytes()
   implement safe unicode encode/decode with oslo_utils.encodeutils

heat: convert pub key file from bytes to unicode
    pkg_resources returns raw bytes, in python3
    we have to decode this to utf-8 unicode
    so JSON can encode it for heat template

JIRA: YARDSTICK-452

Change-Id: Ib80dd1d0c0eb0592acd832b82f6a7f8f7c20bfda
Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

3 files changed, 12 insertions, 12 deletions

diff --git a/tests/functional/test_cli_runner.py b/tests/functional/test_cli_runner.py
index 195b572c7..620edc396 100755
--- a/tests/functional/test_cli_runner.py
+++ b/tests/functional/test_cli_runner.py
@@ -8,6 +8,7 @@
 ##############################################################################
 
 
+from __future__ import absolute_import
 import unittest
 
 from tests.functional import utils
@@ -46,4 +47,3 @@ class RunnerTestCase(unittest.TestCase):
         res = self.yardstick("runner show Sequence")
         sequence = "sequence - list of values which are executed" in res
         self.assertTrue(sequence)
-
diff --git a/tests/functional/test_cli_scenario.py b/tests/functional/test_cli_scenario.py
index 877973783..4741e8244 100755
--- a/tests/functional/test_cli_scenario.py
+++ b/tests/functional/test_cli_scenario.py
@@ -8,6 +8,7 @@
 ##############################################################################
 
 
+from __future__ import absolute_import
 import unittest
 
 from tests.functional import utils
@@ -59,4 +60,3 @@ class ScenarioTestCase(unittest.TestCase):
         res = self.yardstick("scenario show Pktgen")
         pktgen = "Execute pktgen between two hosts" in res
         self.assertTrue(pktgen)
-
diff --git a/tests/functional/utils.py b/tests/functional/utils.py
index aaaaaac22..b96d2dd50 100755
--- a/tests/functional/utils.py
+++ b/tests/functional/utils.py
@@ -7,13 +7,13 @@
 # http://www.apache.org/licenses/LICENSE-2.0
 ##############################################################################
 
+from __future__ import absolute_import
+
 import copy
-import json
 import os
-import shutil
 import subprocess
 
-
+from oslo_serialization import jsonutils
 from oslo_utils import encodeutils
 
 
@@ -40,11 +40,11 @@ class Yardstick(object):
         """Call yardstick in the shell
 
         :param cmd: yardstick command
-        :param getjson: in cases, when yardstick prints JSON, you can catch output
-            deserialized
+        :param getjson: in cases, when yardstick prints JSON, you can catch
+         output deserialized
         TO DO:
-        :param report_path: if present, yardstick command and its output will be
-            written to file with passed file name
+        :param report_path: if present, yardstick command and its output will
+         be written to file with passed file name
         :param raw: don't write command itself to report file. Only output
             will be written
         """
@@ -53,11 +53,11 @@ class Yardstick(object):
             cmd = cmd.split(" ")
         try:
             output = encodeutils.safe_decode(subprocess.check_output(
-                self.args + cmd, stderr=subprocess.STDOUT, env=self.env))
+                self.args + cmd, stderr=subprocess.STDOUT, env=self.env),
+                'utf-8')
 
             if getjson:
-                return json.loads(output)
+                return jsonutils.loads(output)
             return output
         except subprocess.CalledProcessError as e:
             raise e
-