unicode metadata breaks cinderclient show command

[Alexey Stupnikov]

It is impossible to use 'cinder show' command if we add some unicode metadata to volume.

Steps to reproduce:

1. Create a volume and add unicode metadata
2. Try to show volume's properties with 'cinder show VOL-ID' command

Expected result:
Volume properties are printed at the CLI

Actual result:
# cinder show bd539719-245c-4e91-bfbc-b81e4d247c15 | grep ' metadata '
ERROR: 'ascii' codec can't encode characters in position 0-7: ordinal not in range(128)

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: 9.0/mitaka
Change author: Yuriy Nesenenko <email address hidden>
Review: https://review.fuel-infra.org/35455

[Fuel Devops McRobotson (fuel-devops-robot)]

Related fix proposed to branch: master
Change author: Alexey Stupnikov <email address hidden>
Review: https://review.fuel-infra.org/35493

[Fuel Devops McRobotson (fuel-devops-robot)]

Change abandoned by Alexey Stupnikov <email address hidden> on branch: master
Review: https://review.fuel-infra.org/35493
Reason: Useless to merge.

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/35455
Submitter: Pkgs Jenkins <email address hidden>
Branch: 9.0/mitaka

Commit: 9e78c026f42fec2340f52a7dcde694fce8404c0d
Author: Yuriy Nesenenko <email address hidden>
Date: Thu Jun 1 10:25:22 2017

Fix Unicode error printing extra-specs

If type-key is set to unicode the command cinder extra-specs-list
fails with the ERROR: 'ascii' codec can't encode characters in position.
This patch fixes it.

Change-Id: Id82bfbe8870351605f53c7ca029b9aa7e6089f6a
Closes-Bug: #1693713
Related-Bug: #1622629

[Vladimir Jigulin (vjigulin)]

Verified on 9.0-2017-09-01 snapshot
With proposed:
root@node-1:~# cinder show 323eb307-44b6-4ad1-beac-ea5e51c4e6f0|grep metadata
| metadata | {u'test': u'\u0442\u0435\u0441\u0442'} |