Fix functional tests for Python 3.4

* shlex.split() expects a string. Not bytes.
* decode the bytestring result of subprocess's communicate()
  to a string.

Change-Id: I209f67a91dc609b1e30cb9e683d3d6ee63d00069

Author: Sirushti Murugesan

functional/common/test.py

@@ -28,13 +28,14 @@
 
 def execute(cmd, fail_ok=False, merge_stderr=False):
     """Executes specified command for the given action."""
-    cmdlist = shlex.split(cmd.encode('utf-8'))
+    cmdlist = shlex.split(cmd)
     result = ''
     result_err = ''
     stdout = subprocess.PIPE
     stderr = subprocess.STDOUT if merge_stderr else subprocess.PIPE
     proc = subprocess.Popen(cmdlist, stdout=stdout, stderr=stderr)
     result, result_err = proc.communicate()
+    result = result.decode('utf-8')
     if not fail_ok and proc.returncode != 0:
         raise exceptions.CommandFailed(proc.returncode, cmd, result,
                                        result_err)

functional/tests/compute/v2/test_server.py

@@ -32,14 +32,14 @@ class ServerTests(test.TestCase):
     def get_flavor(cls):
         raw_output = cls.openstack('flavor list -f value -c ID')
         ray = raw_output.split('\n')
-        idx = len(ray)/2
+        idx = int(len(ray)/2)
         return ray[idx]
 
     @classmethod
     def get_image(cls):
         raw_output = cls.openstack('image list -f value -c ID')
         ray = raw_output.split('\n')
-        idx = len(ray)/2
+        idx = int(len(ray)/2)
         return ray[idx]
 
     @classmethod
@@ -49,7 +49,7 @@ def get_network(cls):
         except exceptions.CommandFailed:
             return ''
         ray = raw_output.split('\n')
-        idx = len(ray)/2
+        idx = int(len(ray)/2)
         return ' --nic net-id=' + ray[idx]
 
     @classmethod