Fix pg_controldata TAP test

Author: reshke

src/test/perl/PostgreSQL/Test/Cluster.pm

@@ -558,8 +558,8 @@ sub init
 	mkdir $self->backup_dir;
 	mkdir $self->archive_dir;
 
-	PostgreSQL::Test::Utils::system_or_bail('initdb', '-D', $pgdata, '-A',
-		'trust', '-N', @{ $params{extra} });
+	PostgreSQL::Test::Utils::system_or_bail('initdb', '-D', $pgdata, '-A', 'trust',
+		'--shared_buffers=128000kB', '--max_connections=150', '-N', @{ $params{extra} });
 	PostgreSQL::Test::Utils::system_or_bail($ENV{PG_REGRESS},
 		'--config-auth', $pgdata, @{ $params{auth_extra} });