tf-a-gerrit-tforg-l2: Add parameter to control number of LAVA job retries

Just passed down to tf-a-builder.

Following https://linaro.atlassian.net/browse/TFC-449

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ic841800ec7fbe2d2ee60b5384014e585ee662bca
1 file changed