Stack reset helps reset situation where user may press Ctrl-C in the
middle of command and current established session does not close
properly. When operating in single session mode, drive shall not let
establish another session until sessionTimeout is reached or drive
is power cycled (whichever occurs first).

Stack Reset helps reset any on going session and able to re-establish
session without reaching timeout or physically removing drive (or
power cycling the drive).

Use of timeout was interesting idea - but a few drives that tested
showed min and max SessionTimeout, when configured value in between,
session could not be established due to invalid parameters.

SessionTimeout is optional implementation, while Stack Reset is required
as per spec.

Note: No functionality change expected.