use SimpleReferenceObject in svtools module

to replace hand-rolled version

Change-Id: I7a1048ff1ea335c3934fe7e91a09489a4d7aeb96
use SimpleReferenceObject in svx module

to replace hand-rolled version

Change-Id: I084a21161ae44991199fbd2b12d61dcb7d592408
use SimpleReferenceObject in connectivity module

to replace hand-rolled version

Change-Id: I7a7bf7f8f7d4f8a73ee842e7aba5eab5a254d8eb
use SimpleReferenceObject in comphelper module

to replace hand-rolled version

Change-Id: Ie4e66d2f1f893c04be589877ef53f470ca74c9eb