Moved sim/ to test/simulator

All test code will be in test/. The simulator will be a subdirectory and
separate for all of the other unit test code.

Change-Id: I18c787c8180a93e09b91c74968284062391d915d
diff --git a/test/simulator/hei_sim_main.cpp b/test/simulator/hei_sim_main.cpp
new file mode 100644
index 0000000..41ffe7f
--- /dev/null
+++ b/test/simulator/hei_sim_main.cpp
@@ -0,0 +1,12 @@
+#include "hei_isolator.hpp"
+
+int main()
+{
+    libhei::Isolator iso;
+
+    iso.initialize();
+
+    iso.isolate();
+
+    return 0;
+}