standalone: keep only 5MB of logs

50 was too much now that we keep snapshots in tests.

slapos/slap/standalone.py

@@ -103,7 +103,7 @@ class SupervisorConfigWriter(ConfigWriter):
         redirect_stderr = true
         stdout_logfile = {stdout_logfile}
         stdout_logfile_maxbytes = 5MB
-        stdout_logfile_backups = 10
+        stdout_logfile_backups = 1
 
     """).format(**locals())