NEX-5237 git-pbchk fails to detect parent branch
Reviewed by: Dan Fields <dan.fields@nexenta.com>

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  #
  # Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  # Copyright 2008, 2012 Richard Lowe
  # Copyright 2014 Garrett D'Amore <garrett@damore.org>
  # Copyright (c) 2014, Joyent, Inc.
+ # Copyright 2016 Nexenta Systems, Inc.
  # Copyright (c) 2015, 2016 by Delphix. All rights reserved.
  # Copyright 2016 Nexenta Systems, Inc.
  #
  
  import getopt