Missing all_tenants support for cluster listing

[Feilong Wang]

User case:

As admin user, I'd like to list all clusters across all tenants.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/531066

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/531066
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=198fce72e5baa9450fc26f55c16dc6c0bfe3d5d0
Submitter: Zuul
Branch: master

commit 198fce72e5baa9450fc26f55c16dc6c0bfe3d5d0
Author: Feilong Wang <email address hidden>
Date: Thu Jan 4 10:33:57 2018 +1300

    Support accessing all clusters/templates across projects

    As an admin user, I'd like to access all clusters or templates across
    all projects for operation purpose. Similar function is supported by
    most of the other services, like Nova, Neutron, Cinder, Heat, etc.

    Related-Bug: #1740982

    Change-Id: Icaba09de79a3452286fb60fee80a53430317cba0

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/544896
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=6aac36358c1530641dbee2a46c7c1b578c4ef64d
Submitter: Zuul
Branch: master

commit 6aac36358c1530641dbee2a46c7c1b578c4ef64d
Author: Daniel Abad <email address hidden>
Date: Thu Feb 15 12:29:45 2018 +0000

    Admin can now delete clusters in any project

    After merging https://review.openstack.org/#/c/531066/
    it would be interesting for admin users to be able to
    delete clusters and cluster templates as well.

    Related-Bug: #1740982
    Change-Id: I91f909e8814b86fd5f8b555573238b99b47ffd03

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: stable/queens
Review: https://review.openstack.org/547089

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/547089
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=0b9867041633e8515e8dbadbadd6299415ff5241
Submitter: Zuul
Branch: stable/queens

commit 0b9867041633e8515e8dbadbadd6299415ff5241
Author: Daniel Abad <email address hidden>
Date: Thu Feb 15 12:29:45 2018 +0000

    Admin can now delete clusters in any project

    After merging https://review.openstack.org/#/c/531066/
    it would be interesting for admin users to be able to
    delete clusters and cluster templates as well.

    Related-Bug: #1740982
    Change-Id: I91f909e8814b86fd5f8b555573238b99b47ffd03
    (cherry picked from commit 6aac36358c1530641dbee2a46c7c1b578c4ef64d)