patch 8.0.0911: terminal test takes too long

Problem:    Terminal test takes too long.
Solution:   Instead of "sleep 1" use a Python program to briefly sleep.

src/testdir/test_short_sleep.py

@@ -0,0 +1,11 @@
+#!/usr/bin/python
+#
+# Program that sleeps for 100 msec
+#
+# This requires Python 2.6 or later.
+
+import time
+
+if __name__ == "__main__":
+
+    time.sleep(0.1)  # sleep 100 msec