ENH: angledDuct: renamed wall to walls

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/0/T

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/0/U

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/0/alphat

...rials/compressible/rhoPimpleFoam/ras/angledDuct/0/epsilon

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/0/k

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/0/mut

tutorials/compressible/rhoPimpleFoam/ras/angledDuct/0/p

...pleFoam/ras/angledDuct/constant/polyMesh/blockMeshDict.m4

tutorials/compressible/rhoPimplecFoam/angledDuct/0/U

tutorials/compressible/rhoPimplecFoam/angledDuct/0/alphat

tutorials/compressible/rhoPimplecFoam/angledDuct/0/epsilon

tutorials/compressible/rhoPimplecFoam/angledDuct/0/k

tutorials/compressible/rhoPimplecFoam/angledDuct/0/mut

tutorials/compressible/rhoPimplecFoam/angledDuct/0/p

...PimplecFoam/angledDuct/constant/polyMesh/blockMeshDict.m4

...ible/rhoPimplecFoam/angledDuct/constant/polyMesh/boundary

...s/compressible/rhoPorousSimpleFoam/angledDuctImplicit/0/T

...s/compressible/rhoPorousSimpleFoam/angledDuctImplicit/0/U

...pressible/rhoPorousSimpleFoam/angledDuctImplicit/0/alphat

...ressible/rhoPorousSimpleFoam/angledDuctImplicit/0/epsilon