[FSI] Update to time stepping

[jginternational]

Updating FSI app to the time stepping.

It was taking the time step value for structural from the fluid app, but the user had both in the GUI.
It it has to be the same timestep for both apps, we can place it in the common section of the gui.

[jginternational]

In addition, the app seem to be broken.

Several deprecation warnings and an error occur:

TetrahedralMeshOrientationCheck: No inverted elements found
Mesh orientation check found 720 inverted conditions.
NavierStokesSolverMonolithic: Model reading finished.
PartitionedFSIBaseSolver: Fluid fluid_positive FSI coupling interface created
[WARNING] CreateFillCommunicator: This function is deprecated, use "CreateFillCommunicatorFromGlobalParallelism" instead
PartitionedFSIBaseSolver: Coupling strategy construction finished
PartitionedFSIBaseSolver: Structure FSI coupling interface created
[WARNING] CreateFillCommunicator: This function is deprecated, use "CreateFillCommunicatorFromGlobalParallelism" instead
::[MechanicalSolver]:: : DOF's ADDED
::[ImplicitMechanicalSolver]:: : DOF's ADDED
NavierStokesSolverMonolithic: Fluid solver DOFs added correctly.
::[MeshSolverBase]:: DOFs ADDED.:
[WARNING] DEPRECATION-Warning; MappingApplication: The "MapperFactory" was moved to the Core! (used for "CreateMapper")
::[MechanicalSolver]:: : Initializing ...
[WARNING] DEPRECATION-Warning; MechanicalSolver: Using "line_search", please move it to "solving_strategy_settings" as "type"
::[MechanicalSolver]:: No linear solver was specified, using fastest available solver:
Linear-Solver-Factory: Creating "sparse_lu" as fastest available direct solver
::[MechanicalSolver]:: : Finished initialization.
Linear-Solver-Factory: Constructing a regular (non-complex) linear-solver
NavierStokesSolverMonolithic: Solver initialization finished.
Linear-Solver-Factory: Constructing a regular (non-complex) linear-solver
::[MeshSolverBase]:: Finished initialization.:
aaa: Analysis -START-
aaa: STEP =  1
aaa: TIME =  0.002
[WARNING] ResidualBasedBlockBuilderAndSolver: ATTENTION! setting the RHS to zero!
[WARNING] DEPRECATION-Warning; MappingApplication: The "Mapper" was moved to the Core! (used for "SWAP_SIGN")
PartitionedFSIBaseSolver: FSI non-linear iteration = 0 |res|/sqrt(nDOFS) = 9.005636836600007e-09
PartitionedFSIBaseSolver: FSI non-linear iteration convergence achieved in 0 iterations.
Traceback (most recent call last):
  File "C:\Users\garat\Desktop\aaa.gid\MainKratos.py", line 45, in <module>
    simulation.Run()
  File "E:\Deploy_Kratos\KratosMultiphysics\analysis_stage.py", line 48, in Run
    self.RunSolutionLoop()
  File "E:\Deploy_Kratos\KratosMultiphysics\analysis_stage.py", line 68, in RunSolutionLoop
    self.OutputSolutionStep()
  File "E:\Deploy_Kratos\KratosMultiphysics\FSIApplication\fsi_analysis.py", line 93, in OutputSolutionStep
    super(FSIAnalysis, self).OutputSolutionStep()
TypeError: super(type, obj): obj must be an instance or subtype of type
KRATOS TERMINATED WITH ERROR

[rubenzorrilla]

Substepping capabilities are not implemented in Kratos yet. Ergo, time step must be the same in both apps. We decided to take the fluid app. time step as "master".