Merge pull request #1797 from wenqing/petsc_fixing

MathLib/LinAlg/LinAlg.cpp

MathLib/LinAlg/LinAlg.h

MathLib/LinAlg/PETSc/PETScLinearSolver.cpp

MathLib/LinAlg/PETSc/PETScVector.cpp

MathLib/LinAlg/PETSc/PETScVector.h

NumLib/DOF/MeshComponentMap.cpp

NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.cpp

ProcessLib/GlobalVectorFromNamedFunction.cpp

ProcessLib/HT/Tests.cmake

ProcessLib/Process.cpp

ProcessLib/StaggeredCouplingTerm.cpp

ProcessLib/StaggeredCouplingTerm.h

ProcessLib/TES/TESProcess.cpp

Tests/Data

Tests/MathLib/TestGlobalVectorInterface.cpp

Tests/MathLib/TestLinearSolver.cpp

Tests/NumLib/ODEs.h

Tests/NumLib/TestODEInt.cpp

Tests/NumLib/TimeLoopSingleODE.h