Retrieve disaggregated solution

[laradicp]

fix #540

• getsolutions retrieves the disaggregated solution from disagg_result in Optimizer

[guimarqu]

It's a good start.

The disaggregated solution may have columns with fractional values if we proved that there exists a combination that leads to feasible columns with integer values. Since we don't have such a mechanism, this solution may be infeasible.

In the meantime, we can check the integrality of columns from sps with upper multiplicity greater than 1 in the feasibility checker.

Let's keep this issue for later.

[guimarqu]

By the way, I wouldn't store the OptimizationStates in a vector because it creates an implicit convention that we'll forget (1st entry for the aggregated solution, 2nd for the disaggregated one).

[guimarqu]

I think that you should test the feature by creating a new algorithm that returns a pre-defined solution. Then, you test if you can retrieve the same solution with the new interface.

[guimarqu]

(I misclicked)