Validate request parameters against max string and integer limit and return 400 error instead of 500

[Pranali Deore]

Below apis returns 500 error if name or description string lengths are greater than string size defined in DB i.e., 255

1. consisgroup-create
2. consisgroup-update
3. cgsnapshot-create
4. quota-class-update
5. quota-update
6. qos-create

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/194968
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=cf67960607844ef3426cae4d6e2ab96f16187b99
Submitter: Jenkins
Branch: master

commit cf67960607844ef3426cae4d6e2ab96f16187b99
Author: PranaliDeore <email address hidden>
Date: Wed Jun 17 04:49:24 2015 -0700

    Validate string, integer limit for input parameter

    1. Below apis will return 500 error code on passing name or description
       parameters with more than 255 characters:
       a. consisgroup-create
       b. consisgroup-update
       c. cgsnapshot-create
       d. quota-class-update
       e. quota-update
       f. qos-create
       g. volume-manage
       h. volume-transfer

    2. Below apis will return 500 error code on passing 'hard_limit' value
       greater than mysql INT type:
       a. quota-class-update
       b. quota-update
       c. encryption-type-create

    3. Below apis accept name as string with whitespaces:
       a. consisgroup-create
       b. cgsnapshot-create
       c. qos-create
       d. volume-transfer

    4. Type-key api will return 500 error code on passing key or value with
       more than 255 characters.

    Added new method
    1. validate_name_and_description() in
       cinder.api.openstack.wsgi.Controller to validate length of name and
       description and returned 400 if it exceeds the limit and removing
       leading or trailing whitespaces and string containing only
       whitespaces.
    2. validate_string_length() in cinder.api.openstack.wsgi.Controller to
       validate length of string and returned 400 if it exceeds the limit.
    3. validate_integer() method in cinder.utils to validate integer
       limit and returned 400 if limit exceeds.

    APIImpact
    1. For all above apis 400 response will be returned.
    2. Earlier it was possible to pass only whitespaces or leading-trailing
       spaces to 'name' parameters and 'key' while updating key-value in
       type-key api.
       Now it will raise 400 error if only whitespaces are passed and will
       remove leading-trailing spaces if present in other cases.

    Closes-Bug: 1466351
    Closes-Bug: 1463379
    Closes-Bug: 1465967
    Change-Id: I0c0029d61ba2b293b579d1afffec0bdf062b22a8