Fix the reprocessing tests
The existing tests were using an Upgrade dataset, no longer supported on run2-patches branch.
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boole-reprocess-xdstnow uses the same XDST file as the Brunel mc11a-xdst test -
boole-reprocess-xdigiuses a Sim09 xdigi file as described in LHCBGAUSS-1008
Copied from !168 (merged)