WPA is not using agents.config.polling.interval configuration property

WPA is ignoring value set in com.sun.identity.agents.config.polling.interval property and is relying only on configuration change notifications.

Steps to reproduce:
1) disable configuration notification
2) let agent process one request
3) change agent property in OpenAM console
4) Wait for polling interval

Observed result:
*) agent is not able to get that configuration change

Expected result:
*) agent proceeds with a new request to fetch configuration from OpenAM