Client: Simplify PG12/Postgis 3 interaction

client/test/expected/00_installation_test.out

@@ -1,30 +1,17 @@
 -- Only show warning or error messages in the tests output
-SET client_min_messages TO WARNING;
--- Install dependencies
-CREATE EXTENSION postgis;
-CREATE EXTENSION @@plpythonu@@;
-CREATE EXTENSION cartodb;
-CREATE EXTENSION plproxy;
--- Install the extension
-CREATE EXTENSION cdb_dataservices_client;
--- Mock the server connection to point to this very test db
-SELECT cartodb.cdb_conf_setconf('geocoder_server_config', '{"connection_str": "dbname=contrib_regression host=127.0.0.1 user=postgres"}');
+\set ECHO none
  cdb_conf_setconf 
 ------------------
  
 (1 row)
 
--- Mock the user configuration
-SELECT cartodb.cdb_conf_setconf('user_config', '{"is_organization": false, "entity_name": "test_user"}');
  cdb_conf_setconf 
 ------------------
  
 (1 row)
 
--- Mock the server schema
-CREATE SCHEMA cdb_dataservices_server;
--- Create a test user to check permissions
-DROP ROLE IF EXISTS test_regular_user;
-CREATE ROLE test_regular_user;
-GRANT publicuser TO test_regular_user;
-ALTER ROLE test_regular_user SET search_path TO public,cartodb,cdb_dataservices_client;
+CREATE SCHEMA
+DROP ROLE
+CREATE ROLE
+GRANT ROLE
+ALTER ROLE