lava_wait_jobs.py: get_finished_jobs: Increase poll delay to 5s

The older value of 0.5s is too small: we know that on average a LAVA job
takes much longer than 0.5s (or even 5s), so, while we're waiting for
job completion, polling each 0.5s doesn't make much sense: we only
generate undue load on the LAVA server. 5s seems like a good value
to keep response real-time enough and don't waste LAVA resources.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I8c60b45d6459cc85e5cde3f081e53cf473e9e90e
1 file changed