bug: Warning about dump file not being synchronized is broken on macos

[richardsimko]

On a fresh install of pm2 and macos I did the following:

1. Configure pm2 for startup
2. Dumpfile is empty
3. pm2 start --name test "yes"
4. Script with name test starts
5. pm2 status

At this point I was expecting this warning to be logged:

pm2/lib/API/UX/pm2-ls.js

Line 30 in 3b3b547

Common.warn(`Current process list is not synchronized with saved list. Type 'pm2 save' to synchronize.`)

6. pm2 save
7. pm2 delete test
8. pm2 status

At this point I would be expecting this warning:

pm2/lib/API/UX/pm2-ls.js

Line 27 in 3b3b547

Common.warn(`Current process list is not synchronized with saved list. App ${chalk.bold(diff.join(' '))} differs. Type 'pm2 save' to synchronize.`)

In neither case the warning shows up.

This has regressed since 5.4.3 and has been broken since 6.0.5.