Quota error message should be more descriptive

[Adam Huffman]

When I tried to lower a project's quota of cores to below the number currently in use, instead of the useful CLI error message, the balloon that appears says:

Error: Modified project information and members, but unable to modify project quotas.

It would be much clearer if it said something similar to the CLI message:

ERROR: Quota value 140 for cores are greater than already used and reserved 146

[Liyingjun (liyingjun)]

Seems like nova can return the BadRequest message, so log the exception message to balloon would help.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/70158

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/86226

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/70158
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=f0e2b01cd345b46fe3afe46fd5f8133bb28cb169
Submitter: Jenkins
Branch: master

commit f0e2b01cd345b46fe3afe46fd5f8133bb28cb169
Author: liyingjun <email address hidden>
Date: Tue Jan 14 14:14:00 2014 +0800

    Quota error message should be more descriptive

    forms.ValidationError will be raised if there are invalid quota values.
    The error message would be like: Quota value cannot be less than the
    current usage value: ram used: 512, instances used: 1.

    Change-Id: I6734de7df6c146d647bbc89090d49a48e1b074ae
    Closes-bug: 1274234

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/86226
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=6e14382c65041ec8d6c7d8b45529effc3cace02c
Submitter: Jenkins
Branch: master

commit 6e14382c65041ec8d6c7d8b45529effc3cace02c
Author: liyingjun <email address hidden>
Date: Fri Aug 8 09:45:54 2014 +0800

    Map quota keys to translatable strings

    Change-Id: I1446efad26b140bad04f6c2bddc4f8f980735d72
    Related-bug: 1274234