Test failures when building with Intel 19.x optimized.

Nobody has claimed this yet.

I was testing an optimized Intel build of `develop` and noticed that 2 test failures occur on rzgenie. It appears related to node differencing. For partition, maybe the floating point epsilon is too small? The failure did not occur when using Debug mode.

This failure was with 19.0.4.
Update: Intel 19.1.2 fails too

The failing tests are:
* t_conduit_node_compare
* t_blueprint_mesh_partition

Here is how the code was configured:

```
#!/bin/bash
function build_with_intel
{
cmake -DBUILD_SHARED_LIBS:BOOL=OFF \
-DCMAKE_C_COMPILER=icc \
-DCMAKE_CXX_COMPILER=icpc \
-DCMAKE_Fortran_COMPILER=ifort \
-DCMAKE_C_FLAGS="-gcc-name=/usr/tce/packages/gcc/gcc-8.1.0/bin/gcc -std=gnu11" \
-DCMAKE_CXX_FLAGS="-gxx-name=/usr/tce/packages/gcc/gcc-8.1.0/bin/g++ -std=c++14 " \
-DCMAKE_Fortran_FLAGS=-gcc-name=/usr/tce/packages/gcc/gcc-8.1.0/bin/gcc \
-DCMAKE_BUILD_TYPE:STRING=Release \
-DENABLE_MPI=ON \
-DENABLE_FORTRAN=ON \
-DENABLE_DOCS=OFF \
../src
}
build_with_intel
```

Here is some output from t_conduit_node_compare:

```
%: t_conduit_node_compare
Running main() from /path/conduit_adjset/conduit/src/blt/thirdparty_builtin/googletest-master-2020-01-07/googletest/src/gtest_main.cc
[==========] Running 9 tests from 1 test suite.
[----------] Global test environment set-up.
[----------] 9 tests from conduit_node_compare
[ RUN ] conduit_node_compare.compare_basic
[ OK ] conduit_node_compare.compare_basic (0 ms)
[ RUN ] conduit_node_compare.compare_leaf_numeric
/path/DT/conduit_adjset/conduit/src/tests/conduit/t_conduit_node_compare.cpp:142: Failure
Value of: diff_nodes(n, o, info)
Actual: false
Expected: true
/path/DT/conduit_adjset/conduit/src/tests/conduit/t_conduit_node_compare.cpp:142: Failure
Value of: diff_nodes(n, o, info)
Actual: false
Expected: true
/path/conduit_adjset/conduit/src/tests/conduit/t_conduit_node_compare.cpp:142: Failure
Value of: diff_nodes(n, o, info)
Actual: false
Expected: true
/path/conduit_adjset/conduit/src/tests/conduit/t_conduit_node_compare.cpp:142: Failure
Value of: diff_nodes(n, o, info)
Actual: false
Expected: true
[ FAILED ] conduit_node_compare.compare_leaf_numeric (1 ms)
```

Reproduce the optimized Intel 19.x configuration and run t_conduit_node_compare and t_blueprint_mesh_partition, starting with t_conduit_node_compare.cpp around the reported failure. Compare Release and Debug behavior while investigating node differencing and the possible floating-point epsilon issue; done means both tests pass in the optimized Intel build.

Written by the indexing model from the issue text.