0027151: Exception is raised during performing command "splitshape" in the Test Harness

0027151: Exception is raised during performing command "splitshape" in the Test Harness

Added protection for cases of the overlapped edges.
Returning value for methods in the LocOpe_SplitShape::AddOpenWire(), LocOpe_SplitShape::AddClosedWire() are modified from void to boolean in order to avoid raising exceptions.
To avoid regression for test case modalg_5 bug25243 tolerance of vertices of the degenerated edges are increased to value of tolerance of the splitting vertex for case when splitting vertex was projected on  the degenerated edge.