Bug 34485708

Deleting a node from grid fails due to SSH configuration issue and returns the following error:
[PILOT-00452] Unable to establish SSH connection to node1 to execute command
CAUSE: An attempt to connect to specified node to execute specified command using SSH failed. 
ACTION: Make sure that the specified node is reachable and the SSH daemon on the specified
node is alive.


Update OpenSSH format to RSA format by running the following command on all nodes:
ssh-keygen -p -f private_key_location -m pem
Example: ssh-keygen -p -f ~/.ssh/id_rsa -m pem