Description of problem:
[ovirt-engine-cli] in cli engine failed to redirect Unicode characters to file

Version-Release number of selected component (if applicable):
 Red Hat Enterprise Virtualization Manager Version: 3.4.0-0.21.el6ev 

How reproducible:
Always

Steps to Reproduce:
1. Create new VM with unicode name like : čeněk
2. Open the cli engine and run the command: 
   show vm --id "<new-vm-id>" > /tmp/test.log

Actual results:
failed with the following error:
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/cli/context.py", line 191, in execute_string
    self._execute_command(command)
  File "/usr/lib/python2.6/site-packages/cli/context.py", line 411, in _execute_command
    command.run(self)
  File "/usr/lib/python2.6/site-packages/cli/command/command.py", line 101, in run
    self.execute()
  File "/usr/lib/python2.6/site-packages/ovirtcli/command/show.py", line 152, in execute
    self.context.formatter.format(self.context, obj)
  File "/usr/lib/python2.6/site-packages/ovirtcli/format/text.py", line 269, in format
    self._format_resource(result.superclass, show_empty=show_all)
  File "/usr/lib/python2.6/site-packages/ovirtcli/format/text.py", line 222, in _format_resource
    self.__write_context(format0, format1, width1, field, value, resource_context, reduced_mode_fields=reduced_mode_fields, mode=mode)
  File "/usr/lib/python2.6/site-packages/ovirtcli/format/text.py", line 137, in __write_context
    stdout.write(format1 % val)
UnicodeEncodeError: 'ascii' codec can't encode character u'\u010d' in position 0: ordinal not in range(128)


Expected results:
Run with support to Unicode characters 

Additional info:
when run the command without redirect its run OK.
 show vm --id "<new-vm-id>"