Merge pull request #44 from floodlight/report-random

Report random seed in log even when not specified
diff --git a/oft b/oft
index 92709ab..36569f5 100755
--- a/oft
+++ b/oft
@@ -487,6 +487,11 @@
 if config["random_seed"] is not None:
     logging.info("Random seed: %d" % config["random_seed"])
     random.seed(config["random_seed"])
+else:
+    # Generate random seed and report to log file
+    seed = random.randrange(100000000)
+    logging.info("Autogen random seed: %d" % seed)
+    random.seed(seed)
 
 # Remove python's signal handler which raises KeyboardError. Exiting from an
 # exception waits for all threads to terminate which might not happen.