[BUG] Hostlookup feed name is recovered only from text db types

[frikilax]

Describe the bug
hostlookup's feed name information is only here when using a "text" type db.

Plateform (please complete the following information):

• OS (version): All
• Darwin version: since 1.2.7

To Reproduce
Steps to reproduce the behavior:

1. Configure a hostlookup filter with a json or rsyslog type db (and at least an entry in it)
2. Start darwin
3. Start an interactive session with the darwin-client-python
4. connect to the hostlookup filter through its unix socket
5. send one of the entries from the db to the filter
6. look into the alert generated:
   6.1 rule_name should not be complete (ex: "Lookup: ")
   6.2 details!feed_name should be empty

Expected behavior
the feed name (the name of the database, without path and extension), should be indicated in both the rule_name and feed_name fileds

Screenshots/logs

Additional context
internal attribute feed_name is only set during text db processing