try maxSpareResource with Cumulative constraint. (not work yet)
Add tests for continuous model. Using Cumulative constraint to solve continuous model but it doesn't successful.
Change isSatisfied(plan) of MaxSpareNode. Actions which start at the same time are applied together to produce the new Model.
Add a simplest test in CMaxSpareNodeTest.
IdleNode class for finding the IdleStart and IdleEnd moments of the involved Node. CMaxNode using IdleNode class for each involve node.
IdleNode: Fix calculate idle_start and idle_end
 MaxSpareNode: Fix check satisfy with plan
 CMaxSpareNodeTest: Add more tests
IdleNode: Fix calculate idle_start and idle_end (worked)
CMaxSpareNode: Work with online nodes (need to fix to work with offline nodes as well )
 CMaxSpareNodeTest: Add more tests
CMaxSpareNode: discrete model work when the number of VMs is superior to the number of online nodes.

CMaxSpareNodeTest: Add more simple tests for discrete model
CMaxSpareNodeTest: Update tests
Update tests. Add more tests in CMinSpareNodeTest class.
Fix discrete mode of CMinSpareNode.
discrete mode of CMaxSPareNode still have problem. (may come from the objective function of btrplace.
Fix Discrete mode of MinSpareNode and MaxSpareNode: MinSpareNode turn on additional nodes if the the current configuration cannot fix by migrating VMs. Same for turn off current online nodes in MaxSpareNode.
MinSpareNode works with continuous model.
MaxSpareNode has not worked with continuous model yet. Problem with applying action plan.