Feature request: provide option to generate a single job containing all sub-runs

[jevbelikov]

For comparability of results it would be useful to have all sub-runs be grouped into a single larger job so that all scheduled nodes are the same for the sub-runs.

It would be another dependency, but you could also consider integrating with the bolt tool for run script generation: see https://github.com/EPCCed/bolt

[aowenson]

First request fulfilled, see branch: feature/gen-job-single-batch