We started to use this job to build artifacts for running OST.

Looks like this job is limited to one concurrent job, which make it less useful than

it could be.

If we don't make it easy to run OST, people will not run it, and the change queue

will break.

Please change the limit to use the same limit used for regular builds. We seem to be

able to create more then 10 concurrent builds by uploading patches to gerrit. The manual

runner should this as well.

Nir