[20190124185150] Local Rack Updates

[ddollar]

Tweaks to the new local Rack to make it easier to run large applications.

• #3080 decrease default cpu and memory for local rack [@ddollar]
• #3081 restore resource apis for local rack [@ddollar]
• #3082 use PersistentVolumes for local volumes [@ddollar]
• #3083 properly configure local dns in one-off runs [@ddollar]