box/ClusterRunner — pull request #17 by tjlee0909 (2014-11-04 19:28:08+00:00)
Title: Replace the paramiko implementation with direct Popen calls for ssh

Paramiko is very strict about authentication, and we cannot figure out what configuration settings we must set in order to have ssh calls work with hosts that have properly configured keys. So we are replacing Paramiko with bare ssh calls from Popen.