MTU scripts are no longer needed and broken on xenial

[Liam Young]

MTU scripts are no longer needed as MAAS 1.9 can set the mtu and bring up the interfaces.

The charm has no systemd versions of the 'os-charm-phy-mic-mtu' and 'ext-port' scripts either so for xenial to set mtu sizes on physical nics use MAAS 1.9 and appropriate network config

[Liam Young (gnuoy)]

neutron-api charm is needs an update to its config.yaml / README to say that network-device-mtu will not be used to set mtu on physical devices for xenial

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/416975

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/416978

[OpenStack Infra (hudson-openstack)]

Change abandoned by Liam Young (<email address hidden>) on branch: master
Review: https://review.openstack.org/416978
Reason: Superseded by: https://review.openstack.org/#/c/411913

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/416975
Committed: https://git.openstack.org/cgit/openstack/charm-neutron-openvswitch/commit/?id=d57a6e9a4e8ad65fab37fc6f09c66a8f87a0f383
Submitter: Jenkins
Branch: master

commit d57a6e9a4e8ad65fab37fc6f09c66a8f87a0f383
Author: Liam Young <email address hidden>
Date: Thu Jan 5 13:49:04 2017 +0000

    Do not create MTU upstart scripts on xenial+

    MTU scripts are no longer needed as MAAS 1.9 can set the mtu and
    bring up the interfaces.

    The charm has no systemd versions of the 'os-charm-phy-mic-mtu'
    and 'ext-port' scripts either so for xenial to set mtu sizes
    on physical nics use MAAS 1.9 and appropriate network config

    Change-Id: I3aa4d2a80a08dd605d4ae08d53f35282017e1009
    Partial-Bug: 1566786