about 10-20% of times smoketests were using this script to ensure availability
of services, the smoketest failed after the script succeeded. This change
improves the script by:

* providing an early exit for already deployed services without testing
  multiple times for success if the first test succeeds
* raising the amount of successful checks needed to 25 and sleeping a second
  after each successful test in order to lower the probability of the service
  not being available for the smoketest after the script succeeds.

the service normally takes less than 15 seconds to start, so we don't
need an initial delay.

In the context of introducing a lat/lng resolution within `holi-app-volunteering` the first internal
service will consume the unified API. Therefore this commit exposes the URL as Terraform state
output.

This reverts commit 748a91b9.