gptransfer: don't try to transfer temp tables

Which makes no sense, and will fail while creating the schema, whose
name starts with reserved prefix "pg".

The current testing framework could not hold an extra connection for
testing this.

(cherry picked from commit 389d0cc9)

gpMgmt/bin/gptransfer

@@ -772,7 +772,7 @@ FROM
     JOIN pg_catalog.gp_distribution_policy p ON (c.oid = p.localoid)
 WHERE """
     table_sql_filter_out_child_partitions = """c.oid NOT IN ( SELECT parchildrelid as oid FROM pg_partition_rule ) AND """
-    table_sql_part2 = """ n.nspname NOT IN ('gpexpand', 'pg_bitmapindex', 'information_schema', 'gp_toolkit');"""
+    table_sql_part2 = """ n.nspname NOT IN ('gpexpand', 'pg_bitmapindex', 'information_schema', 'gp_toolkit') AND n.nspname NOT LIKE 'pg_temp_%';"""
     all_tables_sql = table_sql_part1 + \
                      ('' if partition_transfer else table_sql_filter_out_child_partitions) + \
                      table_sql_part2