init: fix OSD startup issue

 On machines with MON and OSDs (on boot) OSDs started shortly after MON startup
 but MON needs time to become oprational so OSDs fail to start due to short
 timeout because they don't have enough time to establish communication with
 cluster. This is even more likely to happen when there are other monitors down
 which is not unusual when servers are rebooting after power failure.
 Increasing timeout significantly improves chances for successful OSD start.

Signed-off-by: Dmitry Smirnov <onlyjob@member.fsf.org>