Increased the tolerance on two tests that started failing when we switched the...

Increased the tolerance on two tests that started failing when we switched the reference platform to double precision

platforms/cuda/tests/TestCudaNonbondedForce.cpp

@@ -371,7 +371,7 @@ void testLargeSystem() {
     const int numParticles = numMolecules*2;
     const double cutoff = 2.0;
     const double boxSize = 20.0;
-    const double tol = 1e-3;
+    const double tol = 2e-3;
     CudaPlatform cuda;
     ReferencePlatform reference;
     System system;

platforms/opencl/tests/TestOpenCLNonbondedForce.cpp

@@ -366,7 +366,7 @@ void testLargeSystem() {
     const int numParticles = numMolecules*2;
     const double cutoff = 2.0;
     const double boxSize = 20.0;
-    const double tol = 1e-3;
+    const double tol = 2e-3;
     OpenCLPlatform cl;
     ReferencePlatform reference;
     System system;