Add openpilot tests

panda/tests/get_version.py

@@ -0,0 +1,7 @@
+#!/usr/bin/env python3
+from panda import Panda
+
+if __name__ == "__main__":
+  for p in Panda.list():
+    pp = Panda(p)
+    print(f"{pp.get_serial()[0]}: {pp.get_version()}")