message: Removed unnecessary RAJA header inclusion and added a macro to
  control compilation of openmp collapse variants.
diff: #include "RAJA/RAJA.hpp"
  #include "RAJA/internal/MemUtils_CPU.hpp"
  -#include "RAJA/util/Permutations.hpp"
  #include <iostream>
  +//#define USE_COLLAPSE
  +#undef USE_COLLAPSE
  +
  +
  namespace rajaperf
  {
  namespace basic
  @@ -162,7 +165,7 @@ void NESTED_INIT::runKernel(VariantID vid)
  startTimer();
  for (SampIndex_type isamp = 0; isamp < run_samples; ++isamp) {
  -#if 0 // using collapse actually slows this down a bit...
  +#if defined(USE_COLLAPSE)
  #pragma omp parallel
  {
  #pragma omp for nowait collapse(3)
  @@ -203,7 +206,7 @@ void NESTED_INIT::runKernel(VariantID vid)
  startTimer();
  for (SampIndex_type isamp = 0; isamp < run_samples; ++isamp) {
  -#if 0 // using collapse here has a significant negative performance
  +#if defined(USE_COLLAPSE)
  // impact....is there something wrong with the forallN implementation?
  RAJA::forallN< RAJA::NestedPolicy<
  RAJA::ExecList< RAJA::simd_exec,
  