Server return 500 on non-existing volume uuid

[hongbin]

Description
===========
Create a container with a non-existing cinder volume uuid. The server returns 500

Reproduce
=========
$ zun run --mount source=$(uuidgen),destination=/data nginx
ERROR: Internal Server Error (HTTP 500) (Request-ID: req-90fa7dfb-d881-4510-ae6d-0b6bc0be4dad)

Expect
======
Server return 4xx response

Actual
======
Server return 500 response

NOTE
====
NOTE: this bug occurred only if a *uuid* is passed (pass a cinder volume name is working fine).

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/536248

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/536248
Committed: https://git.openstack.org/cgit/openstack/zun/commit/?id=6281d7aa6f60ecd999e47790b5e53fe6f04108ee
Submitter: Zuul
Branch: master

commit 6281d7aa6f60ecd999e47790b5e53fe6f04108ee
Author: miaohb <email address hidden>
Date: Mon Jan 22 00:22:36 2018 -0800

    Catch exception in volume get

    Server return 500 when creating a container with non-existing volume
    uuid in current version. We should add exception handler in volume get.

    Change-Id: I5920a3a51b7c8d78f516b947045235ddd78e729c
    Closes-Bug: #1742346

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/zun 1.0.0 release.