[Haizea] Suspend Resume as Optional parameter

[Borja Sotomayor]

Hi,

> To fix that, I've added a condition on value of suspension parameter, if
> suspension is set to none, it returns 0:

Thanks for pointing this out. I've committed a fix that's equivalent
(but a bit different) to what you suggested:

https://phoenixforge.cs.uchicago.edu/projects/haizea/repository/revisions/849/diff/branches/1.1/src/haizea/core/scheduler/vm_scheduler.py

Cheers!
-- 
Borja Sotomayor
-Scientific Writer at UChicago's Computation Institute
http://people.cs.uchicago.edu/~borja/
-Community Manager for the OpenNebula project
http://www.opennebula.org/