Open Stack

Hi, I'd like you to take a look at this patch for potential
SecurityImpact.
https://review.openstack.org/120881

Log:
commit a8cecfb569a3a8d36eaa8ad7824db37b60c0ed5a
Author: Tristan Cacqueray <tristan.cacqueray at enovance.com>
Date:   Thu Sep 11 16:31:24 2014 +0000

    Fix password leak from ProcessExecution errors
    
    This backport required changes to fix both issues:
    * Make execute method clean password in exeception
    * Make sure mask_password works properly
    
    This backport is not trivial as these fixes relies on many other
    changes, only the necessary code have been imported/adapted.
    
    ------------------------------------------------
    The sync pulls in the following changes (newest to oldest):
    
    63c99a0f - Mask passwords in exceptions and error messages
    66142c34 - Make strutils.mask_password more secure
    d6b55fb2 - Remove `processutils` dependency on `log`
    cb5a804b - Move `mask_password` to strutils
    
    -----------------------------------------------
    
    Closes-Bug: 1343604
    Closes-Bug: 1345233
    SecurityImpact
    
    Change-Id: I3b49b1d667f6ade9ae3f6765d735440a3e838917