Add run_once to PgPool test user creation #1523

Job	Run time
Execute install_dbserver tests for PostgreSQL 14 on RockyLinux8	2m 36s
Execute ansible-lint	1m 0s
Execute init_dbserver tests for PostgreSQL 14 on RockyLinux8	2m 47s
Execute manage_dbserver tests for PostgreSQL 14 on RockyLinux8	3m 11s
Execute manage_pgbouncer tests for PostgreSQL 14 on RockyLinux8	3m 24s
Execute manage_pgpool2 tests for PostgreSQL 14 on RockyLinux8	3m 57s
Execute setup_dbt2 tests for PostgreSQL 14 on RockyLinux8	3m 53s
Execute setup_dbt2_client tests for PostgreSQL 14 on RockyLinux8	4m 16s
Execute setup_dbt2_driver tests for PostgreSQL 14 on RockyLinux8	3m 16s
Execute setup_dbt3 tests for PostgreSQL 14 on RockyLinux8	4m 38s
Execute setup_dbt7 tests for PostgreSQL 14 on RockyLinux8	4m 3s
Execute setup_pgbouncer tests for PostgreSQL 14 on RockyLinux8	4m 10s
Execute setup_pgpool2 tests for PostgreSQL 14 on RockyLinux8	4m 23s
Execute setup_replication tests for PostgreSQL 14 on RockyLinux8	5m 24s
Execute setup_repmgr tests for PostgreSQL 14 on RockyLinux8	5m 59s
Execute setup_repo tests for PostgreSQL 14 on RockyLinux8	2m 41s
	59m 38s

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