No message for getting element with duplicated name

[Melissa Kam]

If multiple elements (apps, assemblies, etc.) share the same name, then getting/showing the element by name returns nothing rather than a descriptive message.

vagrant@devstack:~$ solum app list
+------------+---------------------------+-------------------------+
| uuid | name | description |
+--------------------------------------+------+--------------------+
| 9a2b9c34-649d-4161-ae28-53fb67aa0699 | test | description |
| e349e042-6a3b-4ada-9fc3-6c76331eeb6f | test | description |
+--------------------------------------+------+--------------------+
vagrant@devstack:~$ solum app show test

vagrant@devstack:~$

API Log:
DEBUG keystoneclient.middleware.auth_token [-] Received request from user: fe886dc0a4d34e86b188511415864310 with project_id : 5ba66656f7f945d194e92804229ec31b and roles: anotherrole,_member_,solum_assembly_update,heat_stack_owner,Member _build_user_headers /opt/stack/python-keystoneclient/keystoneclient/middleware/auth_token.py:996
10.0.2.15 - - [29/Sep/2014 18:07:42] "GET /v1/plans HTTP/1.1" 200 1323