It looks like Cromwell doesn't support LSF. I see there is another execution engine but can't find it named anywhere. Is there a way to submit parallel jobs to LSF from a WDL workflow?
While we do not yet support LSF, you can find a pull request for LSF support here. When it is merged in, you can use it by using the Cromwell hotfix (rather than the latest release). LSF support will be included in a future release, but I cannot guarantee a specific release number.
As a small caveat, I want to note that this solution was not produced by our developers. When it is merged in, it will have been approved by our developers, but it has not passed the same rigorous tests that we apply internally. Therefore, it should work in most, if not all applications, but we cannot guarantee it.