Enable readiness probe for task pod in CI

Avoid race condition where job launch before task container is ready

molecule/default/templates/awx_cr_molecule.yml.j2

@@ -45,6 +45,7 @@ spec:
   extra_settings:
   - setting: LOG_AGGREGATOR_LEVEL
     value: "'DEBUG'"
+  task_readiness_period: 15
 {% if additional_fields is defined %}
   {{ additional_fields | to_nice_yaml | indent(2) }}
 {% endif %}