STYLE: more constness on const char* values

...plates/dynamicCode/fixedValueFvPatchScalarFieldTemplate.C

...plates/dynamicCode/fixedValueFvPatchScalarFieldTemplate.H

src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCode.C

src/OpenFOAM/db/dynamicLibrary/dynamicCode/dynamicCode.H

src/OpenFOAM/global/constants/atomic/atomicConstants.C

src/OpenFOAM/global/constants/atomic/atomicConstants.H

...obal/constants/electromagnetic/electromagneticConstants.C

...obal/constants/electromagnetic/electromagneticConstants.H

...OAM/global/constants/mathematical/mathematicalConstants.H

...obal/constants/physicoChemical/physicoChemicalConstants.C

...obal/constants/physicoChemical/physicoChemicalConstants.H

src/OpenFOAM/global/constants/universal/universalConstants.C

src/OpenFOAM/global/constants/universal/universalConstants.H

src/conversion/meshReader/starcd/STARCDMeshReader.C

src/conversion/meshReader/starcd/STARCDMeshReader.H