Stress action for volume attach verify

The new stress action is able to verify the volume attachment,
on the guest.

The ``new_volume`` option can help in finding out the issue is on the
nova side (or on things controlled by nova) or on cider side.

Change-Id: I2d4c8548a2617dd33e2f116fce8b0b3d379b808e
Consider state in firewall create/delete test

Firewall creation and deletion happens asynchronously.  It is not possible
to delete firewalls until they have become ACTIVE or to delete policies
or rules until its associated firewall has been completely deleted.

This updates the test_create_show_delete_firewall test to create the tenant
network resources required for an ACTIVE firewall and waits on the the
required state changes.  Also, this omits the 'status' key when comparing
the created firewall with the listed firewall as it is very much transient
during this phase of the test.

Change-Id: I556af59b5b22123229cb4d8ddcac9ce6a8b8f49c
Closes-bug: #1302942
Fix stress runner signal related issues

The stress runner with -S option needs to stop all workers on error.

* The workers which terminated successfully (0) must be distinguished
  orm the failed workers, and the successfully terminated workers
  MUST not cause mass termination.
* The SIGCHLD single does not needs to be handled anymore when we terminate all
  workers.
* Does not makes sens to handle again and again, the SIGCHLD signal after
  any worker finished with failure.

Change-Id: Ic563f3acaa4e56f5135c438612f1db990b858552
Delete OrchestrationManager, and its unusual credentials

This removes the need for heat tests to be run with admin user
in the demo tenant.

NeutronResourcesTestJSON also needed to be modified as it was creating a router
with external_gateway_info which is enforced by policy as an admin-only operation.
This router is not required for connectivity in this test. An admin scenario
test can be created in the future which creates a router with
external_gateway_info.

Change-Id: Iba26845423b2bf52259a0c0cfab27ae09cfa4e60
Related-Bug: #1089261
Merge "Consider state in firewall create/delete test"
Merge "Stress action for volume attach verify"
Merge "Fix stress runner signal related issues"
Merge "Delete OrchestrationManager, and its unusual credentials"
Merge branch 'master' of https://github.com/openstack/tempest