Description of problem:
When trying to create an org in foreman when an org with the same name already exists, an ISE is thrown. This is incongruent with such behavior for other subcommands

Steps to Reproduce:
1. 'hammer -u admin -p admin organization create --name foobar' ; note org is created
2. 'hammer -u admin -p admin organization create --name foobar'
3. View results

Actual results:
[root@cloud-qe-21 ~]# hammer -u admin -p admin organization create --name foobar
Could not create the organization:
Error: 500 Internal Server Error

Expected results:
Something like "Organization creation failed: An organization with this name already exists"

Foreman production.log:

Started POST "/api/organizations" for ::1 at 2013-10-25 13:42:55 +0000
Processing by Api::V2::OrganizationsController#create as JSON
  Parameters: {"organization"=>{"name"=>"test"}}
Authorized user admin(Admin User)
undefined method `permission_failed?' for #<Organization:0x000000080a6218> (NoMethodError)
/opt/rh/ruby193/root/usr/share/gems/gems/activemodel-3.2.8/lib/active_model/attribute_methods.rb:407:in `method_missing'
/opt/rh/ruby193/root/usr/share/gems/gems/activerecord-3.2.8/lib/active_record/attribute_methods.rb:149:in `method_missing'
/usr/share/foreman/app/controllers/api/base_controller.rb:54:in `process_resource_error'
/usr/share/foreman/app/controllers/api/base_controller.rb:71:in `process_response'
/usr/share/foreman/app/controllers/concerns/api/v2/taxonomies_controller.rb:47:in `create'

(https://bugzilla.redhat.com/show_bug.cgi?id=1023125)