Reduce PDP timeout

[baszoetekouw]

The current PDP timeout is rather long (30s), so the loadbalancer gives up sooner than EB. Let's look in the logs what the median reponse time and determine a more reasionable timeout based on that.

Ideally, this timeout should be confgurable in the EB config.

[thijskh]

Maybe make it more generic. Every backend API call from EB (to PDP, to AA) should not take more than $seconds where $seconds is most definitely < 10.