Fix XenAPI Netinject tests for Mac

[Rick Harris]

The netinject tests in XenAPI fails on a Mac.

The proximate cause is `netaddr` returning different stringification results between Mac and Linux versions.

The ultimate cause, turns out to be the underlying `socket.inet_ntop` function call which is different between the two operating systems.

An upstream bug is lodged here: https://github.com/drkjam/netaddr/issues/82

Until this is fixed, the easiest fix is to change our expectation depending on the OS in the few (possilbly one) case that it matters.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/146207

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/146207
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=713767660ba44421ea5e0406d121ea868ad178ac
Submitter: Jenkins
Branch: master

commit 713767660ba44421ea5e0406d121ea868ad178ac
Author: Rick Harris <email address hidden>
Date: Tue Feb 10 12:25:05 2015 -0600

    network: Fix IPv6 tests for Mac

    Some network tests would fail on a Mac because the IPv6 addressed returned
    wasn't an exact match due to a difference in the `socket.inet_ntop` function
    that `netaddr` uses.

    On a Mac 0 parts of the IPv6 are compressed away to '::' whereas on Linux they
    remain ':0:'.

    Ultimately, the fix should be in the upstream `netaddr` library which already
    has an issue logged for it: https://github.com/drkjam/netaddr/issues/82

    Until that's fixed, the solution is to skip the offending tests.

    Co-Authored-By: Johannes Erdfelt <email address hidden>
    Change-Id: I7a8a49f4105079a686e553b4d002f04a26b93d0f
    Closes-Bug: 1409135

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/156414

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/156414
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=1234f724bc591545df74648d306376bff256eadb
Submitter: Jenkins
Branch: master

commit 1234f724bc591545df74648d306376bff256eadb
Author: Rick Harris <email address hidden>
Date: Mon Feb 16 17:13:23 2015 -0600

    network: Fix another IPv6 test for Mac

    Commit 713767660ba44421ea5e0406d121ea868ad178ac skipped some tests on a Mac
    that would fail because OSX doesn't stringify IPv6 addresses properly.

    This test was missed, so adding it now.

    Change-Id: I413e2dae75e2144132db468f3e0c81229e3bf45a
    Related-Bug: 1409135

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/163636

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/163636
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2dfa4b8c42fd1afefd5c9b24f9d9ea3c1633149d
Submitter: Jenkins
Branch: master

commit 2dfa4b8c42fd1afefd5c9b24f9d9ea3c1633149d
Author: Rick Harris <email address hidden>
Date: Wed Mar 11 17:53:08 2015 -0500

    network: Fix another IPv6 test for Mac

    Commit 713767660ba44421ea5e0406d121ea868ad178ac skipped some tests on a Mac
    that would fail because OSX doesn't stringify IPv6 addresses properly.

    This test was missed, so adding it now.

    Change-Id: Ic173b68f2c8cbdd621456a79b242e9be11f2c30f
    Related-Bug: 1409135