Failing to open the slow query log should not be fatal

[Michael Still]

2013-12-24 09:06:12,873 task_plugins.gate_real_db_upgrade.task.Runner Exception handling log event.
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/turbo_hipster/task_plugins/gate_real_db_upgrade/task.py", line 94, in start_job
    if self._execute_migrations() > 0:
  File "/usr/local/lib/python2.7/dist-packages/turbo_hipster/task_plugins/gate_real_db_upgrade/task.py", line 268, in _execute_migrations
    ('[sqlerr]', sqlerr)
  File "/usr/local/lib/python2.7/dist-packages/turbo_hipster/lib/utils.py", line 115, in execute_to_log
    fd = os.open(watch_file[1], os.O_RDONLY)
OSError: [Errno 13] Permission denied: '/var/log/mysql/slow-queries.log'