Do not close closed device in Terminal example

When opening is fails, the QSP himself close a device. Thus, we do not
need to close device in Terminal example again, because it caused
emmiting of the QSP::NotOpenError and to showing of additional
messagebox.

Change-Id: Id8aa3f3b835fd7d4187bdf83c1d6584d5fd541f7
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>