0.8.0 allows submission of mixed empty & populated run numbers, which fail server side validation

[bede]

Refactored run number logic no longer fully populates partially completed run numbers, allowing a batches payload to be submitted that fails server side validation.

Caught by Deepak during EC testing (https://oc-collab.gc3.ocs.oraclecloud.com/browse/C900000008-1050)

[bede]

Fixed and released