Fixed various issues with hostbased authentication setup. Added lots of features to better support hadoop based clusters. Master is denoted as master in the /etc/hosts file. All worker nodes are numbered from worker-0 onwords.
Fixed various issues with hostbased authentication setup. Added lots of features to better support hadoop based clusters. Master is denoted as master in the /etc/hosts file. All worker nodes are numbered from worker-0 onwords.

StratusLab/client,StratusLab/client,StratusLab/client,StratusLab/client