power_state of nova diagnostics is number instead of string

[Eli Qiao]

taget@taget-ThinkStation-P300:~/devstack$ nova diagnostics 87c91515-acc7-4953-b0a3-f942484e986e
ERROR (Conflict): Cannot 'get_diagnostics' instance 87c91515-acc7-4953-b0a3-f942484e986e while it is in power_state 4 (HTTP 409) (Request-ID: req-caaf21fc-fa11-4382-9f87-c23928b46eb1)

We need to map instance.power_state to string by
STATE_MAP = {
    NOSTATE: 'pending',
    RUNNING: 'running',
    PAUSED: 'paused',
    SHUTDOWN: 'shutdown',
    CRASHED: 'crashed',
    SUSPENDED: 'suspended',
}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/335776

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/335776
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=4e750dfcc6013e980b3d3698115c6b6b8ad3c96b
Submitter: Jenkins
Branch: master

commit 4e750dfcc6013e980b3d3698115c6b6b8ad3c96b
Author: Eli Qiao <email address hidden>
Date: Thu Jun 30 10:40:17 2016 +0800

    Mapping power_state from integer to string

    To improve user experience, mapping an integer code of power state to
    real string.

    Closes-Bug: #1587780
    Change-Id: I4fbeab0f31492a8aa153044f14f588656f3e332f

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/nova 14.0.0.0b2 development milestone.