Comment 2 for bug 1658343

Reviewed: https://review.openstack.org/423777
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=750c491df7fb5c259a915fd727cec9fdce899186
Submitter: Jenkins
Branch: master

commit 750c491df7fb5c259a915fd727cec9fdce899186
Author: Sławek Kapłoński <email address hidden>
Date: Sun Jan 22 08:20:32 2017 +0000

    Handle attempt to enable br_netfilter in namespace

    When the process is using the IptablesFirewall driver
    and is running in namespaces, there is no
    /proc/sys/net/bridge in the namespace available and
    enable of netfilter for bridge fails with stacktrace
    in logs.
    This patch handles the exception thrown during a
    failed attempted to retrieve net.bridge variable names
    and prints an info message in agent logs instead of
    printing a stacktrace.

    Change-Id: I1ff6cedbf933ac54ef4bbf1d44fc8f57f68d57fc
    Closes-bug: 1658343