* make config into parameter
* test(new engine): local install test
* test(keys): fix test keys
* complete integration test for local install
* add simple mising mechanism
* add --quiet to systemd-run
this will avoid the `Press ^] three times within 1s to disconnect TTY.` message.
it's mentioned in the systemd-run man page too:
```
--quiet, -q
Suppresses additional informational output while running. This is particularly useful in combination with --pty when it will suppress the
initial message explaining how to terminate the TTY connection.
```
* add --quiet to the tests
* add --quiet to TestABSPKGBUILDRepoExistsPerms too