FIX: Fixed RegisterUsingSlidingGeometries tests.

ADD: New baseline for TestSphereAnisotropicSurfaceRASDownsampled as
     well as correct Sphere_movingDownsampled.mha image. The old one
     was in the wrong physical image space.
ENH: Removed distinction between 32bit/64bit machines in what error
     we tolerate. Error tolerance is unified to 0.000001 now.
Change-Id: I7f2cb0876474620add171a400d52e19a913a779d
ENH: Adjust cppcheck suppression handling to include inline suppr.

ADD: Inline suppressions for unusedFunction warnings that show up
     on the dashboard.

Change-Id: I73e85db34dfa4c5622b4b977d5f789df720b4443
Merge topic 'rk-SlidingGeometryTestAdjustments'

99db183 ENH: Adjust cppcheck suppression handling to include inline suppr.
b48d179 FIX: Fixed RegisterUsingSlidingGeometries tests.