introspective-instance-monitor:Calling none in maps in Python 3

[长孙弘奕]

in masakari-monitors/masakarimonitors/introspectiveinstancemonitor/qemu_utils.py:396
code
```
            for row in map(None, *[iter(running)] * columns):
```
can not work with python3.
It return
```
TypeError: 'NoneType' object is not callable
```