Update elasticsearch to 7.13.2

[k-jell]

closes CRJI/EIC#749

[k-jell]

node/templates/hoover-deps.nomad

Line 41 in aef1d40

discovery.type="single-node"

We probably need to set the discovery.seed_hosts instead of using this, but I didn't know which value. (https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery-hosts-providers.html)

[gabriel-v]

Yeah, don't set single-node because we want to be running in multi-node.

Try to give discovery.seed_hosts the IP of the master node only

If that doesn't work out, we can list there the IPs of all the different nodes, but that might not work, because nomad will cascade restart all other services when one of them is restarted - not what we want at all

Also remember to increase the timeouts to something like 10 retries of 45s each, so we end up at around 7min in total