Upgrade Fuseki to v5

[srosset81]

Requires #1189 so that we are not dependent anymore on the Fuseki WAC extension

Currently only v4.8 is available on this Docker image:
https://hub.docker.com/r/stain/jena-fuseki/tags

Changelog of Jena 4:
https://lists.apache.org/thread/m7m73dl7mgp3k5ljolc1tvrt7b202l3w

Changelog of Jena 5:
https://lists.apache.org/thread/hn1d1mpg9hwv7m0m620j53jgpw2rrdyz

Plan to switch to TDB3 / RocksDB:
https://lists.apache.org/thread/0t208m8f76kzfmg75d4gj0v95g11266x
https://github.com/afs/TDB3