Kokkos: disable failing CUDA+DEBUG test

This test requests a hardcoded number of
32 CUDA threads per warp, but with debugging
enabled the CUDA kernel uses too many registers
and can only run on 16 threads per warp max.
[kokkos/kokkos#1514, kokkos/kokkos#1513, #2471]

packages/kokkos/core/unit_test/TestTeamVector.hpp

@@ -900,8 +900,17 @@ TEST_F( TEST_CATEGORY, team_vector )
 #ifndef SKIP_TEST
 TEST_F( TEST_CATEGORY, triple_nested_parallelism )
 {
+// With KOKKOS_DEBUG enabled, the functor uses too many registers to run
+// with a team size of 32 on GPUs, 16 is the max possible (at least on a K80 GPU)
+// See https://github.com/kokkos/kokkos/issues/1513
+#if defined(KOKKOS_DEBUG)
+  if (!std::is_same<TEST_EXECSPACE, Kokkos::Cuda>::value) {
+#endif
   TestTripleNestedReduce< double, TEST_EXECSPACE >( 8192, 2048, 32, 32 );
   TestTripleNestedReduce< double, TEST_EXECSPACE >( 8192, 2048, 32, 16 );
+#if defined(KOKKOS_DEBUG)
+  }
+#endif
   TestTripleNestedReduce< double, TEST_EXECSPACE >( 8192, 2048, 16, 16 );
 }
 #endif