Fix Puppet 3.2.x deprecation warnings

Change-Id: I4f6075fb189474ee071fa9b80944a5fe5c062193
Add swift::bench to manage swift-bench.conf

This patch adds a conf file swift-bench.conf
for swift performance bench, and add a spec
test for it.

Fixed bug 1188968

Change-Id: Iafb67f116a9403bba96328be7c9c09d21a65a74c
Use @ notation for ERB template variables

Fix Puppet 3.2 deprecation warnings (see Puppet #19058)

Change-Id: I0da9696499bce281ad258cbf0e88bd57f7dde76f