sc/qa/unit: recover xDocSh->DoClose()
sc/qa/unit: recover xDocSh->DoClose()

which was removed in fde638b3ac35997aa3e38a37fed56d6eb661806b

Change-Id: I57caf615f0ca49d0b90cb4c68b8ce8edf8f72a97
Reviewed-on: https://gerrit.libreoffice.org/723
Reviewed-by: Markus Mohrhard <17b5858c03a410e5ca9ee070d93f5b34144a17e4@googlemail.com>
Tested-by: Markus Mohrhard <17b5858c03a410e5ca9ee070d93f5b34144a17e4@googlemail.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core