Add run_once to PgPool test user creation #1513

Job	Run time
Execute ansible-lint	1m 0s
Execute manage_dbserver tests for PostgreSQL 14 on RockyLinux8	3m 50s
Execute init_dbserver tests for PostgreSQL 14 on RockyLinux8	3m 7s
Execute install_dbserver tests for PostgreSQL 14 on RockyLinux8	2m 29s
Execute manage_pgbouncer tests for PostgreSQL 14 on RockyLinux8	4m 4s
Execute manage_pgpool2 tests for PostgreSQL 14 on RockyLinux8	4m 9s
Execute setup_dbt2 tests for PostgreSQL 14 on RockyLinux8	4m 26s
Execute setup_dbt2_client tests for PostgreSQL 14 on RockyLinux8	4m 2s
Execute setup_dbt2_driver tests for PostgreSQL 14 on RockyLinux8	3m 11s
Execute setup_dbt3 tests for PostgreSQL 14 on RockyLinux8	3m 46s
Execute setup_dbt7 tests for PostgreSQL 14 on RockyLinux8	3m 23s
Execute setup_pgbouncer tests for PostgreSQL 14 on RockyLinux8	3m 53s
Execute setup_pgpool2 tests for PostgreSQL 14 on RockyLinux8	4m 37s
Execute setup_replication tests for PostgreSQL 14 on RockyLinux8	5m 3s
Execute setup_repmgr tests for PostgreSQL 14 on RockyLinux8	6m 49s
Execute setup_repo tests for PostgreSQL 14 on RockyLinux8	2m 51s
	1h 0m 40s

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