Allow use of libnux hwsimtest runner outside of libnux

* requires to not always add the special case'd tests from libnux
  to the testset

Change-Id: I3677e910540f772642d85fdb4d6df3f48b3945bc

tests/hw/libnux/test_hwsimtests_vx_v2.py

@@ -87,7 +87,8 @@ class LibnuxHwSimTestsVx(unittest.TestCase):
             setattr(LibnuxHwSimTestsVx, test.name, test_method)
 
 
-LibnuxHwSimTestsVx.TESTS.update(get_special_binaries("vx", "v2"))
+LibnuxHwSimTestsVx.TESTS.update(
+    get_special_binaries("vx", "v2").intersection(find_binaries("vx", "v2")))
 LibnuxHwSimTestsVx.TESTS.update(find_binaries("vx", "v2"))
 LibnuxHwSimTestsVx.generate_cases()
 

tests/hw/libnux/test_hwsimtests_vx_v3.py

@@ -87,7 +87,8 @@ class LibnuxHwSimTestsVx(unittest.TestCase):
             setattr(LibnuxHwSimTestsVx, test.name, test_method)
 
 
-LibnuxHwSimTestsVx.TESTS.update(get_special_binaries("vx", "v3"))
+LibnuxHwSimTestsVx.TESTS.update(
+    get_special_binaries("vx", "v3").intersection(find_binaries("vx", "v3")))
 LibnuxHwSimTestsVx.TESTS.update(find_binaries("vx", "v3"))
 LibnuxHwSimTestsVx.generate_cases()