Use fresh interpreter for scopereflection includevector test

Author: aaronj0

Diff for: interpreter/CppInterOp/unittests/CppInterOp/ScopeReflectionTest.cpp

@@ -948,6 +948,7 @@ TEST(ScopeReflectionTest, GetClassTemplateInstantiationArgs) {
 TEST(ScopeReflectionTest, IncludeVector) {
   if (llvm::sys::RunningOnValgrind())
       GTEST_SKIP() << "XFAIL due to Valgrind report";
+  Cpp::CreateInterpreter();
   std::string code = R"(
     #include <vector>
     #include <iostream>