Install/enable sysstat on all nodes

Fixes rcbops-cookbooks/swift-private-cloud#145
Merge pull request #189 from claco/issue-145

Merged automatically by jenkins after successful build test
Admin server w/smarthost now listens on locakhost

Fixes rcbops-cookbooks/swift-private-cloud#117
Merge pull request #190 from claco/issue-117

Merged automatically by jenkins after successful build test
Merge branch 'master' of https://github.com/rcbops-cookbooks/swift-private-cloud