read tis config from cdb_conf

test/CDB_GhostTables.sql

@@ -8,6 +8,7 @@ GRANT EXECUTE ON FUNCTION CDB_Username() TO "fulano";
 GRANT EXECUTE ON FUNCTION CDB_LinkGhostTables() TO "fulano";
 SELECT CDB_EnableGhostTablesTrigger();
 INSERT INTO cdb_conf (key, value) VALUES ('api_keys_fulano', '{"username": "fulanito", "permissions":[]}');
+INSERT INTO cdb_conf (key, value) VALUES ('invalidation_service', '{"host": "fake-tis-host"}');
 SET SESSION AUTHORIZATION "fulano";
 SET client_min_messages TO notice;
 \set QUIET off
@@ -41,4 +42,5 @@ REVOKE EXECUTE ON FUNCTION CDB_Username() FROM "fulano";
 REVOKE SELECT ON cartodb.cdb_ddl_execution FROM "fulano";
 REVOKE ALL ON SCHEMA cartodb FROM "fulano";
 DROP ROLE "fulano";
+DELETE FROM cdb_conf WHERE key = 'api_keys_fulano' OR key = 'invalidation_service';
 \set QUIET off

test/CDB_GhostTables_expect

@@ -1,10 +1,12 @@
 
+WARNING:  Invalidation Service error: Error -2 connecting fake-tis-host:3142. Name or service not known.
 NOTICE:  _CDB_LinkGhostTables() called with username=fulanito, ddl_tag=<NULL>
 
 BEGIN
 0
 CREATE TABLE
 1
+WARNING:  Invalidation Service error: Error -2 connecting fake-tis-host:3142. Name or service not known.
 NOTICE:  _CDB_LinkGhostTables() called with username=fulanito, ddl_tag=CREATE TABLE
 COMMIT
 

test/CDB_Username.sql

@@ -19,4 +19,5 @@ SET SESSION AUTHORIZATION postgres;
 REVOKE USAGE ON SCHEMA cartodb FROM fulano;
 REVOKE EXECUTE ON FUNCTION CDB_Username() FROM fulano;
 DROP ROLE fulano;
+DELETE FROM cdb_conf WHERE key = 'api_keys_fulano';
 \set QUIET off