New commit detected on ManageIQ/manageiq/euwe:
https://github.com/ManageIQ/manageiq/commit/156186eb4ed302fbbec2f814c0aa4acb08c776df

commit 156186eb4ed302fbbec2f814c0aa4acb08c776df
Author:     Milan Zázrivec <mzazrivec@redhat.com>
AuthorDate: Mon Dec 12 14:12:56 2016 +0100
Commit:     Satoe Imaishi <simaishi@redhat.com>
CommitDate: Tue Jan 10 17:19:19 2017 -0500

    Merge pull request #12597 from mansam/disable-cloud-volume-add-button-when-unsupported
    
    Disable the 'add cloud volume' button when no ems supports it.
    (cherry picked from commit a8e77311912fe4155b596265f36e3282cdfaa0cc)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1411982

 .../application_helper/button/cloud_volume_new.rb  | 13 +++++++++
 .../toolbar/cloud_volumes_center.rb                |  1 +
 .../openstack/cloud_manager/cloud_volume.rb        |  1 +
 .../buttons/cloud_volume_new_spec.rb               | 33 ++++++++++++++++++++++
 4 files changed, 48 insertions(+)
 create mode 100644 app/helpers/application_helper/button/cloud_volume_new.rb
 create mode 100644 spec/helpers/application_helper/buttons/cloud_volume_new_spec.rb

I have a setup without a cloud provider, the create tenant option is available 
in build 5.7.1.0.20170124142149_8a5f4d5

by mistake tested cloud tenants and not volumes, verifed

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2017-0320.html