packstack fails when interface has no assigned ip address

[Olga Krishtal]

Function cidr_to_ifname fails in case when the interface has no assigned ip:

facter -p | grep interfaces
interfaces => br0,br1,br_ex,br_int,br_tun,eno16777984,eno33557248,host_routed,lo,ovs_system,venet0,virbr0,virbr0_nic
We have br0 as interface, however it is not configured:
facter -p | grep ip
ipaddress => 10.24.42.26
ipaddress6 => fdb2:2c26:f4e4::1
ipaddress_br1 => 10.24.42.26
ipaddress_br_ex => 10.24.41.26
ipaddress_lo => 127.0.0.1
ipaddress_virbr0 => 10.37.130.2

This leads to:
ipaddress_br0 ERROR

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/392638

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/392638
Committed: https://git.openstack.org/cgit/openstack/packstack/commit/?id=f480c69d76e15c76a5f01dee0b981b000efa7cb3
Submitter: Jenkins
Branch: master

commit f480c69d76e15c76a5f01dee0b981b000efa7cb3
Author: Olga Krishtal <email address hidden>
Date: Wed Nov 2 15:55:22 2016 +0300

    Fixes packstack failure when interface has no assigned ip address

    In case we have unconfigured interfaces cidr_to_ifname() searches
    its ipaddress and network mask and throws an exception.

    Change-Id: I829a874ca44c2e4176bb1eeba28c3f49c44c72ca
    Closes-bug: #1638549

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/newton
Review: https://review.openstack.org/399641

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/399641
Committed: https://git.openstack.org/cgit/openstack/packstack/commit/?id=7deb78830344f38667eccd73090655b8aa6ae555
Submitter: Jenkins
Branch: stable/newton

commit 7deb78830344f38667eccd73090655b8aa6ae555
Author: Olga Krishtal <email address hidden>
Date: Wed Nov 2 15:55:22 2016 +0300

    Fixes packstack failure when interface has no assigned ip address

    In case we have unconfigured interfaces cidr_to_ifname() searches
    its ipaddress and network mask and throws an exception.

    Change-Id: I829a874ca44c2e4176bb1eeba28c3f49c44c72ca
    Closes-bug: #1638549
    (cherry picked from commit f480c69d76e15c76a5f01dee0b981b000efa7cb3)