Problem with removeAllListeners(), fixes #1883

- move process.removeAllListeners() to signal handlers
Remove process.removeAllListeners entirely

- removeAllListeners has no use in case of SIGINT / SIGTERM events
- related issue: balderdashy/sails#1883
Merge pull request #1895 from LukaszKrawczyk/master

Problem with removeAllListeners(), fixes #1883