Refactor selectHost in generic_scheduler
Add a test for selectHost of generic_scheduler
Add check for empty priority list and refactor tests.
Use switch rather than ifs for getPodStatusForReplicationController in pkg/describe.go
Merge pull request #2227 from claire921/refactor_ExpandResourceShortcut

Use switch rather than ifs for getPodStatusForReplicationController
Merge pull request #2197 from claire921/scheduler

Refactor selectHost in Sched
Make DNS an option for cluster turnup
add contrib/dns/MAINTAINERS