Upgrade osm2pgsql to 0.90.0

0.90.0 is available in Jessie backports.

I took eventlogging::service::service as an example of how we pull packages
from backports.

This new version has been tested on new maps2??? servers and show that initial
import and replication are working fine.

Bug: T112423
Depends-on: I0482b718a496cfabf647295b413bce5e2a453375
Change-Id: I13cc0a9566a32cdf8f4ce7a85e22bfdab1c50173