Sync the latest fileutils module from oslo-incubator

Sync the latest fileutils module from oslo-incubator

As part of our normal development in a release we should get
our openstack/common directory code synced up with the latest
code in oslo-incubator.  This is the sync for fileutils:

Current HEAD in OSLO:
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commit 2e41adeb4c19114fd3504eb69891e9149dba7072
Date:   Wed Jun 24 14:45:25 2015 +0000
Updated from global requirements

Changes merged with this patch:
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16eb642eb -- Clean up logging to conform to guidelines

Change-Id: I2cfdb7ca1f876cdb8f0deae5a82484409c0b40cc