Set vm.swappiness value to zero for nodes running systest
Set vm.swappiness value to zero for nodes running systest

Change-Id: I540ab08dacaf57152fe76b62780d69c2c64287f9
Closes-bug: #1447247

fuel-infra/puppet-manifests,fuel-infra/puppet-manifests,fuel-infra/puppet-manifests,fuel-infra/puppet-manifests