[freeipa PR#900][opened] whoami.py: type error when running test

[Tiboris]

   URL: https://github.com/freeipa/freeipa/pull/900
Author: Tiboris
 Title: #900: whoami.py: type error when running test
Action: opened

PR body:
"""
While writing xmlrpc test for this plugin I bumped into:

    TypeError: whoami.validate_output():
        output['arguments']: need (<type 'list'>,); got <type
'tuple'>: (u'krb_staged_user',)
After change in
[whoami.py](https://github.com/freeipa/freeipa/blob/master/ipaserver/plugi...
:
``` python
output.Output('arguments', list, _('Arguments to details function')),
```
to:
``` python
output.Output('arguments', tuple, _('Arguments to details function')),
```
invoking command whoami fails with output **InternalError: an internal error has
occurred**

@stlaz suggested changes which are in this PR.

With these changes _whoami.validate_output()_ does not throw error and tests continue
where they should.
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/900/head:pr900
git checkout pr900

[freeipa PR#900][closed] whoami.py: type error when running test

[pvomacka]

   URL: https://github.com/freeipa/freeipa/pull/900
Author: Tiboris
 Title: #900: whoami.py: type error when running test
Action: closed

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/900/head:pr900
git checkout pr900