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>

4 files changed, 16 insertions, 11 deletions

diff --git a/api/resources/env_action.py b/api/resources/env_action.py
index 7e2487158..8955f3cb6 100644
--- a/api/resources/env_action.py
+++ b/api/resources/env_action.py
@@ -6,25 +6,27 @@
 # which accompanies this distribution, and is available at
 # http://www.apache.org/licenses/LICENSE-2.0
 ##############################################################################
+from __future__ import absolute_import
+
+import errno
+import json
 import logging
-import threading
+import os
 import subprocess
+import threading
 import time
 import uuid
-import json
-import os
-import errno
-import ConfigParser
 
-from docker import Client
+from six.moves import configparser
 
-from yardstick.common import constants as config
-from yardstick.common import utils as yardstick_utils
-from yardstick.common.httpClient import HttpClient
 from api import conf as api_conf
+from api.database.handler import AsyncTaskHandler
 from api.utils import influx
 from api.utils.common import result_handler
-from api.database.handler import AsyncTaskHandler
+from docker import Client
+from yardstick.common import constants as config
+from yardstick.common import utils as yardstick_utils
+from yardstick.common.httpClient import HttpClient
 
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG)
@@ -167,7 +169,7 @@ def _config_influxdb():
 def _change_output_to_influxdb():
     yardstick_utils.makedirs(config.YARDSTICK_CONFIG_DIR)
 
-    parser = ConfigParser.ConfigParser()
+    parser = configparser.ConfigParser()
     parser.read(config.YARDSTICK_CONFIG_SAMPLE_FILE)
 
     parser.set('DEFAULT', 'dispatcher', 'influxdb')
diff --git a/api/resources/release_action.py b/api/resources/release_action.py
index d4dc246ef..c5aa20afc 100644
--- a/api/resources/release_action.py
+++ b/api/resources/release_action.py
@@ -6,6 +6,7 @@
 # which accompanies this distribution, and is available at
 # http://www.apache.org/licenses/LICENSE-2.0
 ##############################################################################
+from __future__ import absolute_import
 import uuid
 import os
 import logging
diff --git a/api/resources/results.py b/api/resources/results.py
index fd518958c..86fc25193 100644
--- a/api/resources/results.py
+++ b/api/resources/results.py
@@ -6,6 +6,7 @@
 # which accompanies this distribution, and is available at
 # http://www.apache.org/licenses/LICENSE-2.0
 ##############################################################################
+from __future__ import absolute_import
 import logging
 import uuid
 
diff --git a/api/resources/samples_action.py b/api/resources/samples_action.py
index df6db17ee..490e48b25 100644
--- a/api/resources/samples_action.py
+++ b/api/resources/samples_action.py
@@ -6,6 +6,7 @@
 # which accompanies this distribution, and is available at
 # http://www.apache.org/licenses/LICENSE-2.0
 ##############################################################################
+from __future__ import absolute_import
 import uuid
 import os
 import logging