github: replace call for sleep with wait-for-it.sh #81
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Previously integration tests invoked
sleep 10
to "give time to settle" the environment. In a fast container, waiting for so long is not needed and in a slow one it might not be enough.This commit changes this line to use
./util/wait-for-it.sh
instead [1] to check robustly that the port is being listened to.Fixes #49.
[1] https://github.com/vishnubob/wait-for-it
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