move import-data option to native python

This adds a new dependecy to the Python psutil package.

test/python/conftest.py

@@ -198,4 +198,13 @@ def placex_table(temp_db_with_extensions, temp_db_conn):
     temp_db_conn.commit()
 
 
-
+@pytest.fixture
+def osm2pgsql_options(temp_db):
+    return dict(osm2pgsql='echo',
+                osm2pgsql_cache=10,
+                osm2pgsql_style='style.file',
+                threads=1,
+                dsn='dbname=' + temp_db,
+                flatnode_file='',
+                tablespaces=dict(slim_data='', slim_index='',
+                                 main_data='', main_index=''))