Add Ansible playbook for resetting kernel memory settings
Add Ansible playbook for resetting kernel memory settings

This playbook can be added as a mandatory post build task. Those
tasks are triggered even when performance tests are manually aborted.

Usage:

  env/bin/ansible-playbook -i clusters/hera.ini playbooks/reset_mem.yml

Change-Id: I9262aed60a4aee6f2ee8093a1316d3a77abbe234
Reviewed-on: http://review.couchbase.org/88670
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Tested-by: Pavel Paulau <dd88eded64e90046a680e3a6c0828ceb8fe8a0e7@gmail.com>
Reviewed-by: Paolo Cocchi <9dd88c9f3e5cbab6e19a6c020f107e0c648ac956@couchbase.com>
Reviewed-by: Pavel Paulau <dd88eded64e90046a680e3a6c0828ceb8fe8a0e7@gmail.com>

couchbase/perfrunner,pavel-paulau/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner