Avoid this failure when installing the package:
```
Setting up prometheus (2.24.1+ds-1+b5) ...
adduser: The user `prometheus' already exists, but is not a system user. Exiting.
dpkg: error processing package prometheus (--configure):
installed prometheus package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
prometheus
```
BREAKING CHANGE: The data dictionary is simplified and expanded.
Retest your states and update pillar data accordingly.
For developer convenience, clientlibs states were introduced.
See pillar.example, defaults.yaml, and docs/README.