Description of problem:
in API 'password' should be a required key during user creation as in CLI:

pulp-admin -u admin -p admin auth user create --login test-user

Enter password for user [test-user] : 
Re-enter password for user [test-user]: 

Password cannot be empty

Enter password for user [test-user] : 

If user will be created with API where 'password' can be skipped then it will be impossible to login with that user:

$ curl -i -H "Accept: application/json" -H "WebFrameworkSwitch: django" -X POST -k -u admin:admin -d '{"login":"test-user1"}' 'https://localhost/pulp/api/v2/users/'
HTTP/1.1 201 CREATED
Date: Mon, 16 Feb 2015 10:36:24 GMT
Server: Apache/2.4.10 (Fedora) OpenSSL/1.0.1e-fips mod_wsgi/3.5 Python/2.7.5
Content-Length: 196
Location: https://localhost/pulp/api/v2/users/test-user1/
Content-Type: application/json

{"_id": {"$oid": "54e1c82845ef485a4c9595f7"}, "name": "test-user1", "roles": [], "_ns": "users", "login": "test-user1", "id": "54e1c82845ef485a4c9595f7", "_href": "/pulp/api/v2/users/test-user1/"}[


$ pulp-admin -u test-user1 repo list
Warning: path should have mode 0700 because it may contain sensitive information: /home/ipanova/.pulp/

Enter password: 
+----------------------------------------------------------------------+
                              Repositories
+----------------------------------------------------------------------+

Session Expired

The session certificate expired on Jan 23 08:13:41 2015 GMT.



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