For LISA 7.5.1, the SSH step is an out of the box feature available after a custom extension is placed in the hot deploy folder.
This custom extension was already available, but the connection testing was failing with the message "Connection Test Failed".
The Workstation log file had the following information:
DEBUG com.itko.lisa.ext.ssh - ***** Unable to borrow object
WARN com.itko.lisa.test.LisaException - LisaException detail There was a problem while connecting to <hostname>:22 exception is java.io.IOException: There was a problem while connecting to <hostname>:22
DEBUG com.itko.lisa.ext.ssh - Invalidating connection for: <username>@<hostname>:Authenticate with Keyboard Interactive
DEBUG com.itko.lisa.ext.ssh - null
at java.lang.Thread.run(Unknown Source)