remove deprecated warning in albertagrid backuprestore facilities
Merged
requested to merge simon.praetorius/dune-grid:issue/alberta_backuprestore_warning into master
Summary
Remove the usage of writeGridXdr and readGridXdr in AlbertaGrid since is produces a deprecated warning.
Details
The functions writeGridXdr and readGridXdr were simplified to writeGrid and readGrid some time ago, but used in the backup-restore facilities of the AlbertaGrid. This emits a deprecated warning all the time. This MR, replaces the old functions with the new ones.
