Description of problem:

from what I read on quota-class we should be able to create a class for a tenant (with name) and than set a quota for a specific user if we want something different. 

1. there is no quota-class-create command, only update. 
2. there is no quota-class-list command in which I can see the 
3. after reading the below wiki for QuotaClass, quota-class-show should list the name of the quota-class. 

https://wiki.openstack.org/wiki/QuotaClass
 
Version-Release number of selected component (if applicable):

openstack-cinder-2013.1.2-3.el6ost.noarch

How reproducible:

100%

Steps to Reproduce:
1. create a tenant 
2. run: cinder quota-class-show <tenant>
3. run: cinder quota-show
4. run: cinder help |grep class

Actual results:

results for quota-class-show and quota-show seem the same because they are created from default. 
grep on commands only show 2 commands which are show and update

Expected results:

1. we should be able to create a quota-class manually
2. quota-class-show should have the quota-class name
3. we should have a list command to show all quota-class in the cloud with tenant and class names/id's

Additional info: