Relative Error Local Conservation Check and Correction of missing synchronize

src/scheme/RoeViscousFormEulerianCompositeSolver_v2.cpp

src/scheme/RoeViscousFormEulerianCompositeSolver_v2_o2.cpp

src/scheme/RusanovEulerianCompositeSolver.cpp

src/scheme/RusanovEulerianCompositeSolver_o2.cpp

src/scheme/RusanovEulerianCompositeSolver_v2.cpp

src/scheme/RusanovEulerianCompositeSolver_v2_o2.cpp