Comment 2 for bug 1864090

Reviewed: https://review.opendev.org/708936
Committed: https://git.openstack.org/cgit/openstack/oslo.rootwrap/commit/?id=23a534b9f5f5aad2a95349f809e05cb9b6429f3c
Submitter: Zuul
Branch: master

commit 23a534b9f5f5aad2a95349f809e05cb9b6429f3c
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Fri Feb 21 15:28:23 2020 +0000

    Implement "realpath" to retrieve the real absolute path

    This function will call "os.path.realpth" and this in turn could call
    "os.getcwd". If the current path has been deleted by other application,
    this method will raise FileNotFoundError exception. This new function
    catches and unsets this exception, returning an empty string.

    Change-Id: If70411d8d189de4a020e528cd54412a5678cfab9
    Closes-Bug: #1864090