'barbican secret list' returns index error on empty list

[Christopher Solis]

When running 'barbican secret list' on an empty database with a fresh installation of devstack, it is returning 'list index out of range'.
The same thing happens when using the openstack CLI as well.

christopher@christopher-VirtualBox:~/devstack$ barbican secret list
list index out of range
christopher@christopher-VirtualBox:~/devstack$ openstack secret list
list index out of range

Something must have been merged recently that is causing this because this was not previously returning this index error.

[Arun Kant (arukant)]

As per our internal testing, the issue is introduced by cliff library version. If barbicanclient is using 1.16 or 1.17, then it happens. This has been fixed in 1.20 version (http://docs.openstack.org/developer/cliff/history.html#id1) which is released on 02/22/2016. It works fine with 1.15 version as well.

Looks like we need to exclude 1.16 and 1.17 version in global requirements in both stable/liberty and master branch to address it correctly.
master - https://github.com/openstack/requirements/blob/master/global-requirements.txt#L20.
stable/liberty - https://github.com/openstack/requirements/blob/stable/liberty/global-requirements.txt#L20

[Kiran Totad (kiran-totad)]

https://review.openstack.org/#/c/436787/