Update docs/storage/afs.md, docs/storage/cernbox.md, docs/storage/eos.md,...

Viktor Manuel Guijarro Plaza requested to merge LOS-1088 into master

Update docs/storage/afs.md, docs/storage/cernbox.md, docs/storage/eos.md, docs/storage/eosfuse.md, docs/storage/s3.md

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