Retains the original default value of 15 seconds for SSH connect
timeout. Allows users to modify this timeout via SSH communicator
option. Enforces integer values for timeout and validates custom
values are greater than 0.
Include config option within ssh_config command output template. Default
remote_user value to set username value. Include existence check on
provided config value to ensure file is available. Update tests to
include coverage on all changes. Add new options to the docs.
