python/samba/netcmd: Fix NameError exception

Running make test TEST=samba4.drs.samba_tool_drs.python results in

BlackboxProcessError: Command '/tmp/samba-testbase/b12/samba/bin/samba-tool drs clone-dc-database samba.example.com --server=localdc -USAMBADOMAIN/Administrator%locDCpass1 --targetdir=/tmp/samba-testbase/b12/samba/bin/ab/tmp/tmpWPo8r3'; exit status 255; stdout: ''; stderr: 'ERROR(<type 'exceptions.NameError'>): uncaught exception - global name 'logging' is not defined
  File "bin/python/samba/netcmd/__init__.py", line 177, in _run
    return self.run(*args, **kwargs)
  File "bin/python/samba/netcmd/drs.py", line 697, in run
    logger.setLevel(logging.INFO)
'

Signed-off-by: Noel Power <[email protected]>
15 jobs for npower-python3-misc in 195 minutes and 9 seconds (queued for 1 second)
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