log file name is change when reload my app

If reporting a bug, please use the following template.

Expected behaviour

log file name always be same

Actual behaviour

log file name is diffrent

Steps to reproduce

1. start my app with instances: 2 and the log file name is

app-out-0.log
app-out-1.log

2. reload app and the log file name change to

app-out.log

Software versions used

OS         : centos 6.5
node.js    : 4.4.7
PM2        : 1.1.3

PM2 Log output

Use the command: tail --lines 50 ~/.pm2/pm2.log

2016-12-26 17:56:54: Starting execution sequence in -cluster mode- for app name:midway-lsapp id:55
2016-12-26 17:56:55: App name:midway-lsapp id:55 online
2016-12-26 17:56:55: Starting execution sequence in -cluster mode- for app name:midway-lsapp id:56
2016-12-26 17:56:55: App name:midway-lsapp id:56 online
2016-12-26 17:59:12: Starting execution sequence in -cluster mode- for app name:midway-lsapp id:55
2016-12-26 17:59:12: App name:midway-lsapp id:55 online
2016-12-26 17:59:13: -reload- New worker listening
2016-12-26 17:59:13: Stopping app:midway-lsapp id:_old_55
2016-12-26 17:59:13: Starting execution sequence in -cluster mode- for app name:midway-lsapp id:56
2016-12-26 17:59:13: App name:midway-lsapp id:56 online
2016-12-26 17:59:14: -reload- New worker listening
2016-12-26 17:59:14: Stopping app:midway-lsapp id:_old_56

cf CONTRIBUTING.md for more informations

Read CONTRIBUTING.md, then reproduce the reload with instances: 2 and inspect the command output in ~/.pm2/pm2.log. Compare the initial app-out-0.log and app-out-1.log names with the post-reload app-out.log result; done means reload preserves the per-instance log filenames.