COMP: Adjust the tolerance for TestTestLinearSelector3D

The tolerance for cell/line intersection was 0. This caused test
failures on some platforms. This patch sets the tolerance to a
reasonable value for the test data.

Change-Id: I72a3d9c7a231090d949f27cce3b72c9860ee1dbc
Merge topic 'AdjustToleranceTestLinearSelector3D' into master

117b4d76 COMP: Adjust the tolerance for TestTestLinearSelector3D