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>

1 files changed, 10 insertions, 4 deletions

diff --git a/yardstick/benchmark/scenarios/networking/iperf3.py b/yardstick/benchmark/scenarios/networking/iperf3.py
index 13fa0155b..b8ec9acdf 100644
--- a/yardstick/benchmark/scenarios/networking/iperf3.py
+++ b/yardstick/benchmark/scenarios/networking/iperf3.py
@@ -10,9 +10,13 @@
 # iperf3 scenario
 # iperf3 homepage at: http://software.es.net/iperf/
 
+from __future__ import absolute_import
+from __future__ import print_function
+
 import logging
-import json
+
 import pkg_resources
+from oslo_serialization import jsonutils
 
 import yardstick.ssh as ssh
 from yardstick.benchmark.scenarios import base
@@ -89,7 +93,7 @@ For more info see http://software.es.net/iperf
         self.host.close()
         status, stdout, stderr = self.target.execute("pkill iperf3")
         if status:
-            LOG.warn(stderr)
+            LOG.warning(stderr)
         self.target.close()
 
     def run(self, result):
@@ -138,7 +142,8 @@ For more info see http://software.es.net/iperf
         # Note: convert all ints to floats in order to avoid
         # schema conflicts in influxdb. We probably should add
         # a format func in the future.
-        result.update(json.loads(stdout, parse_int=float))
+        result.update(
+            jsonutils.loads(stdout, parse_int=float))
 
         if "sla" in self.scenario_cfg:
             sla_iperf = self.scenario_cfg["sla"]
@@ -188,7 +193,8 @@ def _test():
 
     p = Iperf(args, ctx)
     p.run(result)
-    print result
+    print(result)
+
 
 if __name__ == '__main__':
     _test()