Enforce length checking for user name field

[Yuanhui Liu]

Currently in User update, there is no checking on the user name length. But once the form is submitted, the system actually checked the length of the user name and reported error on that, as shown below:

Recoverable error: User name should not be greater than 255 characters. (HTTP 400)

It would be better checking this on the front end.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/73427

[Tatiana Ovchinnikova (tmazur)]

Duplicated: https://bugs.launchpad.net/horizon/+bug/1291216

[Julie Pichon (jpichon)]

The fix for the other patch only handled the length restriction in "Create" so perhaps we can keep this bug open to add the restriction in "Update" as well.

[Zhenguo Niu (niu-zglinux)]

I have updated the bug description for only User Update Form, and will resubmit a patch since there is no response from YuanHui for a long time.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/128819

[OpenStack Infra (hudson-openstack)]

Change abandoned by Zhenguo Niu (<email address hidden>) on branch: master
Review: https://review.openstack.org/73427

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/128819
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=a696e5992e58ac65240df5f226000705c3370365
Submitter: Jenkins
Branch: master

commit a696e5992e58ac65240df5f226000705c3370365
Author: Zhenguo Niu <email address hidden>
Date: Thu Oct 16 11:26:02 2014 +0800

    Restrict the length of user name input

    When updating users, user name should not be greater than 255.

    Change-Id: Icf99fc2adec8d3a044cca4486f332593a91474fa
    Closes-Bug: #1279579