Stop swift resource leaking even if an error occurs

In some test, if an error occurrs in setUpClass(), some resources
are not deleted because of tearDownClass() is not called.
This commit fixes it but doesn't touch the code of creating only one
resource without waiting for the resource creation.

 tempest/api
  +---- baremetal (unnecessary)
  +---- compute
  +---- data_processing (unnecessary)
  +---- database (unnecessary)
  +---- identity
  +---- image (done)
  +---- network
  +---- object_storage         <-- this patch
  +---- orchestration
  +---- queuing (unnecessary)
  +---- telemetry (unnecessary)
  +---- volume (done)

Partially Implements: blueprint stop-leaking

Change-Id: I69dd5bf9dbfa04e463b63f4f236fc0aa9e70e79a
Don't output auth tokens with trace output

The tokens are huge and make it difficult to follow the calls and are not
usually of interest.

Change-Id: Id35eeabedd7b460bf4d200770b2412b5233aed45
orchestration api add test for volume retain deletion policy

Adds a test for OS::Cinder::Volume to ensure the "Retain" deletion
policy is respected on stack deletion

Change-Id: I4720ce0656d0543c1318f4c9acddc5243d94a678
Add support for updating the config file

This commit adds a new flag to the verify_tempest_config.py script,
'-u' that will update the config file from values found during the
verification process.

Partially implements bp config-verification

Change-Id: I20b8bca7d3368b56da0a0496ed7aa3c1a6eacc9e
Add cmd entry point for verify_tempest_config

This commit moves the verify_tempest_config script from the tools dir
to tempest.cmd and adds a pbr entry point for the script. This means
that the script will in effect be a packaged binary for tempest.

Partially implements bp config-verification

Change-Id: I75b9743a8117d55c6c445db05eb39404b5708624
Merge "orchestration api add test for volume retain deletion policy"
Merge "Stop swift resource leaking even if an error occurs"
Merge "Don't output auth tokens with trace output"
Merge branch 'master' of https://github.com/openstack/tempest