Webservice crashes when child process exits

[daviddumon]

Hello,

When the phantomjs child process crashes, the webservice would not correctly restarts. I've just done a small fix for that.

[danigonza]

Yeah I had the same problem! This solution solved Thanks!

[gcrumb]

This will cause exit/restart loops. Better to leave the onExit handler unchanged in startService and then in rasterizerExitHandler:

• this.startService();
• self.startService();