Agile Integration enterprise workload: add missing namespace

TASK [ocp4-workload-agile-integration-enterprise : Deploy PostgreSQL Seed job] ***
Saturday 04 May 2019  08:28:58 +0000 (0:00:01.869)       0:45:16.640 **********
fatal: [clientvm.28f3.internal]: FAILED! => {"changed": true, "cmd": "oc process -f /tmp/agile-integration-enterprise/files/postgresql-seed.yaml | oc apply -n enterprise-services -f-", "delta": "0:00:00.472366", "end": "2019-05-04 08:28:59.829010", "msg": "non-zero return code", "rc": 1, "start": "2019-05-04 08:28:59.356644", "stderr": "error: unable to process template\n  namespaces \"postflightcheck\" not found\nerror: no objects passed to apply", "stderr_lines": ["error: unable to process template", "  namespaces \"postflightcheck\" not found", "error: no objects passed to apply"], "stdout": "", "stdout_lines": []}