[pgpool-committers: 6512] pgpool: Fix oversight to adopt PostgreSQL 12.

[Tatsuo Ishii]

Fix oversight to adopt PostgreSQL 12.

From PostgreSQL 12 WAL dir is renamed to "pg_wal". pgpool_setup should
have dealt with this.

Branch
------
V4_1_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=3fe5c194a79e9d8f51e9752248a37e5a5d489c7a

Modified Files
--------------
src/test/pgpool_setup | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)