Automatic generation of client secrets for test environment

[mtwardawski]

During provision of Keycloak in the test environement client secret were set. At the moment these secrets are
hard-coded in provision.sh.

These secrets were also reused in the docker compose file in .ci/docker/edgar/.

Probably there is a way to generate these secrets which are UUID's automatically and random at start up.

Linux provides a tool uuidgen which generates these UUID's.
The tool may probably be used to generate secrets beforehand and be reused in other files, without hardcoding them somewhere.

Perhaps this can be reused for other UUID's in the test environment too.

[brtmax]

Hello, is this issue still available? Not sure about #312
If no one is currently working on it, I would like to pick it up again

[mbfm]

Hello, yes, this issue is still unsolved and no one is working on it (that we know of).

Looking at this issue now, I felt like it should really be split into two issues, so I just moved the second step into #356.
Feel free to pick whichever one you want to work on. As always, let us know, if you have any questions. 🙂