Data migration services functions

• NWGetDataMigratorInfo(3nw)

• NWGetDefaultSupportModule(3nw)

• NWGetDMFileInfo(3nw)

• NWGetDMVolumeInfo(3nw)

• NWGetSupportModuleInfo(3nw)

• NWMoveFileFromDM(3nw)

• NWMoveFileToDM(3nw)

• NWSetDefaultSupportModule(3nw)