Dump file name issue

[buddly27]

Closing #8

[kirijiri]

Getting a traceback for:

> wiz -r /mill3d/server/apps/WIZ/registry/primary/default/ -r /mill3d/server/apps/WIZ/registry/secondary/default/ -r /jobs/.wiz/registry/ --record /tmp/test_release/ use shadow --view

Traceback (most recent call last):
  File "/mill3d/users/claudiaz/.virtualenvs/wiz/bin/wiz", line 11, in <module>
    load_entry_point('wiz-env', 'console_scripts', 'wiz')()
  File "/mill3d/work/claudiaz/dev/wiz/source/wiz/__main__.py", line 8, in main
    wiz.command_line.main(prog_name="wiz")
  File "/mill3d/users/claudiaz/.virtualenvs/wiz/lib/python2.7/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/mill3d/users/claudiaz/.virtualenvs/wiz/lib/python2.7/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/mill3d/users/claudiaz/.virtualenvs/wiz/lib/python2.7/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/mill3d/users/claudiaz/.virtualenvs/wiz/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/mill3d/users/claudiaz/.virtualenvs/wiz/lib/python2.7/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/mill3d/users/claudiaz/.virtualenvs/wiz/lib/python2.7/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/mill3d/work/claudiaz/dev/wiz/source/wiz/command_line.py", line 693, in wiz_use
    _export_history_if_requested(click_context)
  File "/mill3d/work/claudiaz/dev/wiz/source/wiz/command_line.py", line 1959, in _export_history_if_requested
    history = wiz.history.get(serialized=True)
  File "/mill3d/work/claudiaz/dev/wiz/source/wiz/history.py", line 55, in get
    return json.dumps(_HISTORY, default=_json_default)
  File "/mill3d/server/apps/PYTHON/el7-x86-64/python-2.7.15/lib/python2.7/json/__init__.py", line 251, in dumps
    sort_keys=sort_keys, **kw).encode(obj)
  File "/mill3d/server/apps/PYTHON/el7-x86-64/python-2.7.15/lib/python2.7/json/encoder.py", line 207, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/mill3d/server/apps/PYTHON/el7-x86-64/python-2.7.15/lib/python2.7/json/encoder.py", line 270, in iterencode
    return _iterencode(o, 0)
  File "/mill3d/work/claudiaz/dev/wiz/source/wiz/history.py", line 148, in _json_default
    raise TypeError("{} is not JSON serializable.".format(_object))
TypeError: <wiz.definition.Definition object at 0x7f32dd97b110> is not JSON serializable.