Fix missing attribute from when running test tools in task

We forgot to copy the "from" attribute when passing command to slave
machine for execution. This results in "command not found" since the
slave machine tries to execute the command without changing to test tool
directory.

Signed-off-by: Jan Tluka <jtluka@redhat.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>