Fixed Segregated Solver bugs

src/cellmodels/MCellModel.hpp

src/coupled/MainCoupled.cpp

src/coupled/problem/CoupledProblem.hpp

src/coupled/solvers/SegregatedSolver.cpp

src/coupled/solvers/SegregatedSolver.hpp

src/elasticity/assemble/IElasticity.cpp

src/elasticity/assemble/IElasticity.hpp

src/elasticity/problem/ElasticityProblem.cpp

src/elasticity/solvers/IterativePressureSolver.cpp

src/electrophysiology/assemble/IElphyAssemble.cpp

src/electrophysiology/assemble/IElphyAssemble.hpp

src/electrophysiology/problem/ElphyProblem.hpp

src/electrophysiology/solvers/ElphySolver.cpp

src/electrophysiology/solvers/ElphySolver.hpp