:mute: Less verbose unaccent installation
:mute: Less verbose unaccent installation

Previously, when unaccent was already installed, further calls would log:

```
INFO 12:56:1484830611 Trying to install unaccent in database odooproduction@db...
NOTICE: extension "unaccent" already exists, skipping
CREATE EXTENSION
INFO 12:56:1484830611 Unaccent extension installed
```

... too much information for something so irrelevant.

Now, we only log when the extension gets installed or there is a problem.

PCatinean/docker-odoo-base,Tecnativa/docker-odoo-base,PCatinean/docker-odoo-base,Tecnativa/docker-odoo-base