Comment 2 for bug 1619028

Reviewed: https://review.openstack.org/363917
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=5e4204804ea4b364d27d014d13ecb529bc370ea6
Submitter: Jenkins
Branch: master

commit 5e4204804ea4b364d27d014d13ecb529bc370ea6
Author: Corey Wright <email address hidden>
Date: Wed Aug 31 14:34:13 2016 -0500

    Mock call to sysctl for test_get_free_namespace_port

    The code under test shouldn't execute local commands for multiple
    reasons (eg the command doesn't exist on the test system), so mock out
    the execution of sysctl in test_get_free_namespace_port (copying the
    code from test_get_unused_port).

    Change-Id: I58aa578274310ae2ca015069f99edb84716fb0b5
    Closes-bug: #1619028