Unclear error when auth_encryption_key changed

[Rabi Mishra]

Unclear error message returned to the user when doing 'openstack stack resource list <stack_name>"

ERROR: Remote error: InvalidToken
['

which can be misunderstood as a keystone issue.

Steps to reproduce:

1. set "encrypt_parameters_and_properties=True" in heat.conf
2. create a stack
3. change the auth_encryption_key
4. list the resources in the stack

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/494092

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/494092
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=46adb6649dee2a18ef73d421747ac9ca8db474f0
Submitter: Jenkins
Branch: master

commit 46adb6649dee2a18ef73d421747ac9ca8db474f0
Author: rabi <email address hidden>
Date: Wed Aug 16 12:02:56 2017 +0530

    Fix error for invalid auth_encryption_key

    cryptography module throws an InvalidToken exception that does
    not have any error message.

    Change-Id: Ied520cd9ff60032fad1ae13e4a81dad6847d82ab
    Closes-Bug: #1711047

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/heat 10.0.0.0b1 development milestone.