generate_report.sh: take into account OpenCI build/lava job names

Currently, Open CI tf-ci-gateway job reports (summary tables) are not being
generated [1], making it difficult to navigate through results. This
commit take into account current Open CI build and lava job names to
be able to generate report correctly.

[1] https://ci.trustedfirmware.org/job/tf-ci-gateway/

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: I9ff42ebc102fb619785f26c25506beb7f245b894
1 file changed