STYLE: use unique_ptr instead of autoPtr for adios variables

src/adiosFoam/read/adiosReader.C

src/adiosFoam/read/adiosReader.H

src/adiosFoam/read/adiosReaderCloud.C

src/adiosFoam/write/adiosCoreWrite.C

src/adiosFoam/write/adiosCoreWrite.H

src/adiosFoam/write/adiosCoreWriteTemplates.C

src/adiosWrite/adiosReadData.C