Tools/Action: fix typo

This fixes this traceback:

```
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/Bcfg2/Client/Tools/__init__.py", line 223, in Install
    states[entry] = func(entry)
  File "/usr/lib/python2.7/dist-packages/Bcfg2/Client/Tools/Action.py", line 71, in InstallAction
    return self.RunAction(entry)
  File "/usr/lib/python2.7/dist-packages/Bcfg2/Client/Tools/Action.py", line 39, in RunAction
    if not Bcfg2.Options.setup.dryrun:
AttributeError: 'Namespace' object has no attribute 'dryrun'
```