tests/run-tests: Be sure to close Pyboard object on completion.

pfalcon · pfalcon · commit 5b2db4bb5154 · 2017-04-02T20:49:16.000+03:00
So underlying device was properly closed too.
diff --git a/tests/run-tests b/tests/run-tests
@@ -456,7 +456,10 @@ def main():
         # clear search path to make sure tests use only builtin modules
         os.environ['MICROPYPATH'] = ''
 
-    if not run_tests(pyb, tests, args):
+    res = run_tests(pyb, tests, args)
+    if pyb:
+        pyb.close()
+    if not res:
         sys.exit(1)
 
 if __name__ == "__main__":
