Fix Replanner error disabling

[Framba-Luca]

This PR:

• Adds the possibility of disabling the checks in the replanner constructor
• cleans the SequentialSimulator structure
• fixes small error report when the name in a problem is duplicated

[codecov-commenter]

Codecov Report

Patch coverage: 75.00% and project coverage change: +0.02% 🎉

Comparison is base (d5e5dcd) 84.98% compared to head (382f0a7) 85.01%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #485      +/-   ##
==========================================
+ Coverage   84.98%   85.01%   +0.02%     
==========================================
  Files         198      198              
  Lines       26006    26019      +13     
==========================================
+ Hits        22102    22120      +18     
+ Misses       3904     3899       -5     

Files Changed	Coverage Δ
unified_planning/model/htn/hierarchical_problem.py	89.65% <0.00%> (ø)
unified_planning/model/mixins/actions_set.py	90.47% <0.00%> (ø)
unified_planning/model/mixins/agents_set.py	79.41% <0.00%> (ø)
unified_planning/model/mixins/fluents_set.py	86.74% <0.00%> (ø)
unified_planning/model/mixins/objects_set.py	87.71% <0.00%> (ø)
unified_planning/model/mixins/user_types_set.py	91.07% <0.00%> (ø)
unified_planning/engines/factory.py	74.50% <100.00%> (+0.05%)	⬆️
unified_planning/engines/mixins/replanner.py	84.90% <100.00%> (+6.05%)	⬆️
...ed_planning/engines/mixins/sequential_simulator.py	92.75% <100.00%> (+0.10%)	⬆️
unified_planning/engines/replanner.py	94.91% <100.00%> (+1.69%)	⬆️
... and 2 more

... and 1 file with indirect coverage changes

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