Merge pull request #1 from tnachen/drill

changes from timothy
Merge pull request #2 from tnachen/drill

Add missing stop drill and modify run drill for service-nanny
Fixed issues with the script

script didn't have correct signature bits for drill and zookeeper processes in service-nanny
Update setup_drill

configured to execute on master only
Merge pull request #3 from ksumit/drill

Fixed issues in the script