erp5_simulation: split and move solver now working when there is several lines in delivery

The code was assuming that we could have only one quantity divergency per
delivery. So improve to support multiple divergencies.

product/ERP5/Document/QuantitySplitMoveSolver.py

@@ -104,14 +104,14 @@ class QuantitySplitMoveSolver(QuantitySplitSolver):
     if divergence_list:
       solver_process_tool = portal.portal_solver_processes
       solver_process = solver_process_tool.newSolverProcess(delivery_to_move)
-      solver_decision, = [x for x in solver_process.contentValues()
-        if x.getCausalityValue().getTestedProperty() == "quantity"]
-      # use Quantity Accept Solver.
-      solver_decision.setSolverValue(portal.portal_solvers['Adopt Solver'])
-      # configure for Accept Solver.
-      solver_decision.updateConfiguration(tested_property_list=['quantity'])
-      solver_process.buildTargetSolverList()
-      solver_process.solve()
+      for solver_decision in [x for x in solver_process.contentValues() \
+          if x.getCausalityValue().getTestedProperty() == "quantity"]:
+        # use Quantity Accept Solver.
+        solver_decision.setSolverValue(portal.portal_solvers['Adopt Solver'])
+        # configure for Accept Solver.
+        solver_decision.updateConfiguration(tested_property_list=['quantity'])
+        solver_process.buildTargetSolverList()
+        solver_process.solve()
 
     # Finish solving
     if self.getPortalObject().portal_workflow.isTransitionPossible(