Specific workflow computing appliance count causes last task not to finish

[skornel02]

When creating a Cybershake workflow job with specific amount of WorkflowComputingAppliances (4 for example) the simulation finishes, but only 99 tasks get finished out of 100 (Cybershake_100.xml).

See the example regression simulation here

The following can be seen in the log file:

~~Information about the simulation:~~
 
	cloud1:  2 utilised VMs (IDs):  
	432  
	436  

 
1597180 1.4166666666666666E-8 
Energy Cons. by cloud1 1.43285315625E8 
	fog1:  2 utilised VMs (IDs):  
	433  
	438  

 
2659750 2.8333333333333332E-8 
Energy Cons. by fog1 2.38810125E7 
	fog2:  2 utilised VMs (IDs):  
	434  
	437  

 
3214444 2.8333333333333332E-8 
Energy Cons. by fog2 0.0 
	fog3:  2 utilised VMs (IDs):  
	435  
	439  

 
1613600 2.8333333333333332E-8 
Energy Cons. by fog3 7.16430375E7 
432: 16 jobs 
433: 18 jobs 
434: 10 jobs 
435: 15 jobs 
436: 9 jobs 
437: 15 jobs 
438: 6 jobs 
439: 10 jobs 
Completed: 99/100 
Total cost: 0.23478088 
Total energy consumption: 2.38809365625E8 
Execution time: 970421 Real execution time 772825ms (~12 minutes)