osm module

Module to handle installation of osm2pgsql, osmosis, and population and
syncing with from planet.osm

While at it enabled the hstore extension in postgres module
Also upload the already populated grants for osmosis and fix a couple of
bugs in the postgresql module while at it

Change-Id: Id3db056ace7a073831e90ebdaf47f6d9b2596ec5
Merge "osm module" into production