tests-extra: fix the all-servers startup method

When all servers are already running, don't start some of them again.

diff --git a/tests-extra/tools/dnstest/test.py b/tests-extra/tools/dnstest/test.py
index 4144d196edb3363eec683e74f969b12ae336c6e1..90ca1f9e31dda493a7ad9edb7ba5feb3d1372801 100644 (file)
--- a/tests-extra/tools/dnstest/test.py
+++ b/tests-extra/tools/dnstest/test.py
@@ -284,6 +284,7 @@ class Test(object):
             if not server.listening():
                 self.stop(kill=True)
                 self.start()
+                break
 
         self.start_tries = 0