1014: Fixed hardcoded antispam and antivirus host addresses r=mergify[bot] a=ajgon
## What type of PR?
enchancement
## What does this PR do?
Adds configurable parameters `HOST_ANTISPAM` and `HOST_ANTIVIRUS` for `core/dovecot` and `services/rspamd`, instead of using hardcoded container names.
### Related issue(s)
- closes#978
Co-authored-by: Igor Rzegocki <igor@rzegocki.pl>
Co-authored-by: Tim Möhlmann <muhlemmer@gmail.com>
In the process we found that the previous way of tenacity syntax caused it not to honor any args.
In this commit we've refactored to use the @decorator syntax, in which tenacity seems to behave better.
Michael Wyraz