replace fuelmenu's post-deployment check to use not use docker

[Matthew Mosesohn]

We need to ensure that settings for PXE network are restricted after deployment. With the removal of Docker in Fuel 9.0, this check will fail and probably break some of the patching scenarios that may be necessary in the future

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[Matthew Mosesohn (raytrac3r)]

https://review.openstack.org/#/c/303016/ in progress

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/303016
Committed: https://git.openstack.org/cgit/openstack/fuel-menu/commit/?id=eabced57553962a937840bcb2c489caefae4a507
Submitter: Jenkins
Branch: master

commit eabced57553962a937840bcb2c489caefae4a507
Author: Matthew Mosesohn <email address hidden>
Date: Thu Apr 7 22:14:42 2016 +0400

    Fix get_deployment_mode to rely on fuelclient config

    Docker is no longer used, so this is a way to tell if
    the system was deployed.

    Change-Id: Ie9dbd93b8780cb189a6ad62d10a98fb4fabb3639
    Closes-Bug: #1567300

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/307245

[Matthew Mosesohn (raytrac3r)]

The initial solution in 307245 should be good for 9.0, but let's write a state file in /etc/fuel that indicates the deployment mode. /etc/fuel/deployment_state should contain the string "pre" or "post" and that will be far more reliable. We will probably update fuel-library to set deployment_state to "post" after nailgun API is up.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/307245
Committed: https://git.openstack.org/cgit/openstack/fuel-menu/commit/?id=cc4628c865e19b310a6135d2f34975286b29b797
Submitter: Jenkins
Branch: master

commit cc4628c865e19b310a6135d2f34975286b29b797
Author: Matthew Mosesohn <email address hidden>
Date: Mon Apr 18 17:59:13 2016 +0300

    Fix get_deployment_mode to rely on keys directory

    Docker is no longer used, so this is a way to tell if
    the system was deployed and block changing risky settings.

    Change-Id: Ic78a973ca7e9f16b1f32c98f15f736993615e859
    Closes-Bug: #1567300

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/mitaka
Review: https://review.openstack.org/307666

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/307666
Committed: https://git.openstack.org/cgit/openstack/fuel-menu/commit/?id=52a49236ced9d1e4eb3746c135e7e6f9308fe223
Submitter: Jenkins
Branch: stable/mitaka

commit 52a49236ced9d1e4eb3746c135e7e6f9308fe223
Author: Matthew Mosesohn <email address hidden>
Date: Mon Apr 18 17:59:13 2016 +0300

    Fix get_deployment_mode to rely on keys directory

    Docker is no longer used, so this is a way to tell if
    the system was deployed and block changing risky settings.

    Change-Id: Ic78a973ca7e9f16b1f32c98f15f736993615e859
    Closes-Bug: #1567300
    (cherry picked from commit cc4628c865e19b310a6135d2f34975286b29b797)

[Alex Schultz (alex-schultz)]

Verified on 9 #465