tests-extra: ensure reproducible test starts at the beginning of a second

tests-extra/tests/dnssec/reproducible/test.py

@@ -8,6 +8,7 @@ import os
 import shutil
 import os.path
 import random
+import time
 
 from dnstest.test import Test
 from dnstest.keys import Keymgr
@@ -72,6 +73,10 @@ os.rename(ZFILE, ZFILE_)
 
 t.start()
 
+# ensure the test starts at the beginning of a second
+while round((time.time()%1) * 100) > 1:
+    time.sleep(0.01)
+
 # now un-hide zonefile, invoke load and NOTIFY, and let both slaves sign in same second!
 os.rename(ZFILE_, ZFILE)
 master.ctl("zone-reload")