Set utf-8 in decode and encode calls

It eases backporting in iruya and hunter as a few logs can't be
decoded as ascii [1].

[1] https://build.opnfv.org/ci/job/functest-opnfv-functest-vnf-iruya-juju_epc-run/56/console

Change-Id: I52a6f9a25130cbf62e8ce3b9972064ab73177665
Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
(cherry picked from commit 5853dd1ef3c522a975f9685250b1b3e85588f738)

1 files changed, 3 insertions, 3 deletions

diff --git a/functest/opnfv_tests/openstack/vmtp/vmtp.py b/functest/opnfv_tests/openstack/vmtp/vmtp.py
index 4397e2b47..57bc6c3ea 100644
--- a/functest/opnfv_tests/openstack/vmtp/vmtp.py
+++ b/functest/opnfv_tests/openstack/vmtp/vmtp.py
@@ -104,7 +104,7 @@ class Vmtp(singlevm.VmReady2):
         if not os.path.exists(self.res_dir):
             os.makedirs(self.res_dir)
         cmd = ['vmtp', '-sc']
-        output = subprocess.check_output(cmd).decode()
+        output = subprocess.check_output(cmd).decode("utf-8")
         self.__logger.info("%s\n%s", " ".join(cmd), output)
         with open(self.config, "w+") as conf:
             vmtp_conf = yaml.load(output)
@@ -146,12 +146,12 @@ class Vmtp(singlevm.VmReady2):
         cmd = ['vmtp', '-d', '--json', '{}/vmtp.json'.format(self.res_dir),
                '-c', self.config]
         output = subprocess.check_output(
-            cmd, stderr=subprocess.STDOUT, env=new_env).decode()
+            cmd, stderr=subprocess.STDOUT, env=new_env).decode("utf-8")
         self.__logger.info("%s\n%s", " ".join(cmd), output)
         cmd = ['vmtp_genchart', '-c', '{}/vmtp.html'.format(self.res_dir),
                '{}/vmtp.json'.format(self.res_dir)]
         output = subprocess.check_output(
-            cmd, stderr=subprocess.STDOUT).decode()
+            cmd, stderr=subprocess.STDOUT).decode("utf-8")
         self.__logger.info("%s\n%s", " ".join(cmd), output)
         with open('{}/vmtp.json'.format(self.res_dir), 'r') as res_file:
             self.details = json.load(res_file)