fix regression tests

Author: fredroy

examples/3instruments_collis.scn

@@ -76,7 +76,7 @@
 		<EulerImplicitSolver rayleighStiffness="0.2" rayleighMass="0.1" printLog="false" />
 		<BTDLinearSolver subpartSolve="0" verification="0" verbose="0"/>
 		<RegularGridTopology name="meshLinesCombined"
-            nx="181" ny="1" nz="1"
+            nx="180" ny="1" nz="1"
             xmin="0.0" xmax="1.0"
             ymin="0" ymax="0"
             zmin="1" zmax="1"

examples/SingleBeamDeploymentCollision.scn

@@ -46,7 +46,7 @@
     <Node name="BeamModel">
         <EulerImplicitSolver rayleighStiffness="0.2" rayleighMass="0.1" printLog="false" />
         <BTDLinearSolver verbose="0"/>
-        <RegularGridTopology name="MeshLines" nx="61" ny="1" nz="1"
+        <RegularGridTopology name="MeshLines" nx="60" ny="1" nz="1"
                                     xmax="0.0" xmin="0.0" ymin="0" ymax="0" zmax="0" zmin="0"
                                     p0="0 0 0" drawEdges="1"/>
         <MechanicalObject template="Rigid3d" name="DOFs Container" ry="-90" />