Added subsys lock to worker init script.

[awiddersheim]

This is required on RHEL style machines to properly handle run level changes.

You can read about it in more detail here which isn't the best documentation I know but the best I could find that validates why this change is necessary.

http://www.redhat.com/magazine/008jun05/departments/tips_tricks/

[sni]

This will probably only work if you run the init script with the root user. Could you fix that, to only do that if the init script is run with id 0? There are already examples in the script.

[awiddersheim]

I think that should do it

[sni]

thanks, its merged