Tests: In CTestTest2 skip the kwsys.testProcess-10 test that leaks

This test intentionally leaks memory so KWSys excludes it from MemCheck.
However, when CTestTest2 runs under our own MemCheck then valgrind may
recursively check tests run by ctest_test() calls in our test.cmake
script.  Teach these calls to exluce testProcess-10 too.  Also read
the KWSys CTestCustom.cmake file so ctest_memcheck() will ignore the
test too.

Tests/CTestTest2/test.cmake.in

@@ -39,14 +39,19 @@ CMAKE_CXX_COMPILER_ARG1:STRING=@CMAKE_CXX_COMPILER_ARG1@
 CTEST_TEST_KWSYS:BOOL=ON
 ")
 
+set(test_exclude
+  kwsys.testProcess-10
+  )
+
 CTEST_START(Experimental)
 #CTEST_UPDATE(SOURCE "${CTEST_SOURCE_DIRECTORY}" RETURN_VALUE res)
 CTEST_CONFIGURE(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res)
+CTEST_READ_CUSTOM_FILES(${CTEST_BINARY_DIRECTORY})
 CTEST_BUILD(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res)
-CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res START 1 END 5 STRIDE 2)
-CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res START 7 STRIDE 2 SUBMIT_INDEX 1)
-CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res START 2 END 4 STRIDE 2 SUBMIT_INDEX 2)
-CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res START 6 STRIDE 2 SUBMIT_INDEX 3)
+CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res EXCLUDE ${test_exclude} START 1 END 5 STRIDE 2)
+CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res EXCLUDE ${test_exclude} START 7 STRIDE 2 SUBMIT_INDEX 1)
+CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res EXCLUDE ${test_exclude} START 2 END 4 STRIDE 2 SUBMIT_INDEX 2)
+CTEST_TEST(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res EXCLUDE ${test_exclude} START 6 STRIDE 2 SUBMIT_INDEX 3)
 CTEST_MEMCHECK(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res STRIDE 1.5)
 CTEST_COVERAGE(BUILD "${CTEST_BINARY_DIRECTORY}" RETURN_VALUE res)