Re-enable ducted_fan problem and update test configuration

- Remove ducted_fan from excluded problems list in main package
- Update test configuration to focus on ducted_fan problem
- Regenerate test figures for ducted_fan problem
- All tests pass successfully with ducted_fan problem

Author: ocots

src/OptimalControlProblems.jl

@@ -65,9 +65,7 @@ function make_list_of_problems()
     problems_to_exclude = [
         :bioreactor,
         :cart_pendulum,
-        #:dielectrophoretic_particle,
         :moonlander,
-        :ducted_fan,
     ]
     list_of_problems = setdiff(list_of_problems, problems_to_exclude)
 

test/figures/init/ducted_fan.pdf

@@ -32,7 +32,7 @@ list_of_problems = OptimalControlProblems.problems()
 
 # # Override the list of problems to test
 list_of_problems = [
-    :dielectrophoretic_particle,
+    :ducted_fan,
 ]
 
 # The list of all the problems to test