change default quota command example is incorrect

Goes back to pike:

https://review.opendev.org/#/c/490952/4/doc/source/admin/quotas.rst@89

And since the command usage was changed during the doc import, it likely means the whole page needs to be validated for accuracy at this point.

This part is also wrong:

"$ openstack quota set --QUOTA_NAME QUOTA_VALUE PROJECT_OR_CLASS"

Because PROJECT_OR_CLASS will need to have the --class option if it's a class and not a project.

In general, the nova CLI distinguishes quota classes from quotas set on projects, but openstack CLI does not - the latter uses the --class option and is not very well documented about what the --class is, that there is only one (default), and what it means relative to a project's quota which is explained here:

https://docs.openstack.org/nova/latest/user/quotas.html#checking-quota

Fix proposed to branch: master
Review: https://review.opendev.org/667164

Fix proposed to branch: stable/stein
Review: https://review.opendev.org/670096

Fix proposed to branch: stable/rocky
Review: https://review.opendev.org/670097

Fix proposed to branch: stable/queens
Review: https://review.opendev.org/670100

Reviewed: https://review.opendev.org/667164
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=426790237e75eb184191bee1de50ee493252a717
Submitter: Zuul
Branch: master

commit 426790237e75eb184191bee1de50ee493252a717
Author: Stephen Finucane <email address hidden>
Date: Mon Jun 24 17:09:32 2019 +0100

    docs: Correct issues with 'openstack quota set' commands

    Change Ic857918b15496049b5ccacde9515f130cc0bd7e9 against
    openstack-manuals updated the quotas document to use openstackclient
    commands in place of novaclient commands. It missed the fact that you
    need to pass the '--class' parameter if you wish to set a quota for a
    class rather than a project. Correct this.

    Change-Id: I5dc65924fee65f6340d1495a9b1b992001c30731
    Signed-off-by: Stephen Finucane <email address hidden>
    Closes-Bug: #1834057

Reviewed: https://review.opendev.org/670096
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=75a3ae933759fb89abd7ee9847fb6685c22a862c
Submitter: Zuul
Branch: stable/stein

commit 75a3ae933759fb89abd7ee9847fb6685c22a862c
Author: Stephen Finucane <email address hidden>
Date: Mon Jun 24 17:09:32 2019 +0100

    docs: Correct issues with 'openstack quota set' commands

    Change Ic857918b15496049b5ccacde9515f130cc0bd7e9 against
    openstack-manuals updated the quotas document to use openstackclient
    commands in place of novaclient commands. It missed the fact that you
    need to pass the '--class' parameter if you wish to set a quota for a
    class rather than a project. Correct this.

    Change-Id: I5dc65924fee65f6340d1495a9b1b992001c30731
    Signed-off-by: Stephen Finucane <email address hidden>
    Closes-Bug: #1834057
    (cherry picked from commit 426790237e75eb184191bee1de50ee493252a717)

Reviewed: https://review.opendev.org/670097
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=5982c92fa883e40cf01faf58b84e5f93fd7ebdbb
Submitter: Zuul
Branch: stable/rocky

commit 5982c92fa883e40cf01faf58b84e5f93fd7ebdbb
Author: Stephen Finucane <email address hidden>
Date: Mon Jun 24 17:09:32 2019 +0100

    docs: Correct issues with 'openstack quota set' commands

    Change Ic857918b15496049b5ccacde9515f130cc0bd7e9 against
    openstack-manuals updated the quotas document to use openstackclient
    commands in place of novaclient commands. It missed the fact that you
    need to pass the '--class' parameter if you wish to set a quota for a
    class rather than a project. Correct this.

    Change-Id: I5dc65924fee65f6340d1495a9b1b992001c30731
    Signed-off-by: Stephen Finucane <email address hidden>
    Closes-Bug: #1834057
    (cherry picked from commit 426790237e75eb184191bee1de50ee493252a717)
    (cherry picked from commit 75a3ae933759fb89abd7ee9847fb6685c22a862c)

Reviewed: https://review.opendev.org/670100
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=92ecfaab5e66b151d831f524850755ff16a34a37
Submitter: Zuul
Branch: stable/queens

commit 92ecfaab5e66b151d831f524850755ff16a34a37
Author: Stephen Finucane <email address hidden>
Date: Mon Jun 24 17:09:32 2019 +0100

    docs: Correct issues with 'openstack quota set' commands

    Change Ic857918b15496049b5ccacde9515f130cc0bd7e9 against
    openstack-manuals updated the quotas document to use openstackclient
    commands in place of novaclient commands. It missed the fact that you
    need to pass the '--class' parameter if you wish to set a quota for a
    class rather than a project. Correct this.

    Change-Id: I5dc65924fee65f6340d1495a9b1b992001c30731
    Signed-off-by: Stephen Finucane <email address hidden>
    Closes-Bug: #1834057
    (cherry picked from commit 426790237e75eb184191bee1de50ee493252a717)
    (cherry picked from commit 75a3ae933759fb89abd7ee9847fb6685c22a862c)
    (cherry picked from commit 5982c92fa883e40cf01faf58b84e5f93fd7ebdbb)

This issue was fixed in the openstack/nova 19.0.2 release.

This issue was fixed in the openstack/nova 18.2.2 release.

This issue was fixed in the openstack/nova 17.0.12 release.

This issue was fixed in the openstack/nova 20.0.0.0rc1 release candidate.