Update test_xcpp_kernel.py

Author: mcbarton

test/test_xcpp_kernel.py

@@ -131,7 +131,7 @@ class XCppTests(jupyter_kernel_test.KernelTests):
                 'mime': 'image/png'
             }
         ]
-        code_omp='#include <iostream>\n#include "omp.h"\n#include "clang/Interpreter/CppInterOp.h"\nCpp::LoadLibrary("libomp");omp_set_thread_num(4);#pragma omp parallel\n{\nif(omp_get_thread_num()==2) std::cout<<omp_get_thread_num()<<std::endl;}'
+        code_omp='#include <iostream>\n#include <omp>\n#include <clang/Interpreter/CppInterOp.h>\nCpp::LoadLibrary("libomp");int max_threads = omp_get_max_threads();omp_set_thread_num(max_threads);#pragma omp parallel \n{\nif(omp_get_thread_num()==2) std::cout<<omp_get_thread_num()<<std::endl;}'
         def test_xcpp_omp(self):
             self.flush_channels()
             reply, output_msgs = self.execute_helper(code=self.code_omp,timeout=100)
@@ -152,4 +152,4 @@ class XCppTests2(jupyter_kernel_test.KernelTests):
 
 
 if __name__ == '__main__':
-    unittest.main()
+    unittest.main()