servers actions (many) API policy is allowed for everyone even policy defaults is admin_or_owner

[Ghanshyam Mann]

server actions like confirm_resize, reboot etc API policy is default to admin_or_owner[1] but API is allowed for everyone.

We can see the test trying with other project context can access the API
- https://review.opendev.org/#/c/718348/

This is because API does not pass the server project_id in policy target
- https://github.com/openstack/nova/blob/cd16ae25c865f25dbb313976b3d8ef9372db80af/nova/api/openstack/compute/servers.py#L872

and if no target is passed then, policy.py add the default targets which is nothing but context.project_id (allow for everyone try to access)
- https://github.com/openstack/nova/blob/c16315165ce307c605cf4b608b2df3aa06f46982/nova/policy.py#L191

[1]
- https://github.com/openstack/nova/blob/cd16ae25c865f25dbb313976b3d8ef9372db80af/nova/policies/servers.py#L285

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/718501

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/718501
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2a4a7162099ebb61c6d5eb5b410f710b3509a031
Submitter: Zuul
Branch: master

commit 2a4a7162099ebb61c6d5eb5b410f710b3509a031
Author: Ghanshyam Mann <email address hidden>
Date: Wed Apr 8 10:38:49 2020 -0500

    Fix servers policy for admin_or_owner

    servers API policy is default to admin_or_owner[1] but API
    is allowed for everyone.

    We can see the test trying with other project context can access the API
    - https://review.opendev.org/#/c/717204

    This is because API does not pass the server project_id in policy target[2]
    and if no target is passed then, policy.py add the default targets which is
    nothing but context.project_id (allow for everyone who try to access)[3]

    This commit fix this policy by passing the server's project_id in policy
    target.

    Closes-bug: #1871665
    Partial implement blueprint policy-defaults-refresh

    [1] https://github.com/openstack/nova/blob/cd16ae25c865f25dbb313976b3d8ef9372db80af/nova/policies/servers.py#L285
    [2] https://github.com/openstack/nova/blob/cd16ae25c865f25dbb313976b3d8ef9372db80af/nova/api/openstack/compute/servers.py#L872
    [3] https://github.com/openstack/nova/blob/c16315165ce307c605cf4b608b2df3aa06f46982/nova/policy.py#L191

    Change-Id: Ia8234fd9f4ee1871d6f225c8bd4e4adc5289d605