Reduce logging in the pgbench TAP

 test.Induces by requirement of comfort observation of a contrib-check in
 browser (By A.Lakhin report).

Author: danolivo

t/001_pgbench.pl

@@ -8,6 +8,7 @@
 $node->init;
 $node->append_conf('postgresql.conf', qq{
 						shared_preload_libraries = 'aqo'
+						log_statement = 'none'
 						aqo.mode = 'intelligent'
 						aqo.log_ignorance = 'on'
 					});