tests-extra: Disabled TSIG in restart tests.

 - TSIG keys are not the same after restart.

tests-extra/tests/zone/restart/test.py

@@ -21,7 +21,7 @@ def check_axfr(server, zone):
     # Compare AXFRs
     t.axfr_diff_resp(axfr_pre, axfr_post, server, server, zone[0])
 
-t = Test()
+t = Test(tsig=False)
 
 master = t.server("knot")
 slave = t.server("knot")