Fix and simplify reboot stress test. Add new env stuff.

Added stress environment var for max_instances.
Added tempest var for log_level of rest_client.

Change-Id: Ia92536a547cdab4d2496bd9ba9067be3595b79cd

xxxxx

Change-Id: I8c2f499a41f74c2fe6fb08c80ab6fc31f6b93426
diff --git a/stress/README.rst b/stress/README.rst
index bf44f13..1667e31 100644
--- a/stress/README.rst
+++ b/stress/README.rst
@@ -32,6 +32,7 @@
   host_admin_user=<name of user for ssh command>

   nova_logdir=<value of --logdir in nova.conf>

   controller=<hostname for calling nova-manage>

+  max_instances=<limit on instances that will be created>

 

 The stress test needs the top-level tempest directory to be on PYTHONPATH

 if you are not using nosetests to run.