Sweeping !1394 from master to devel: fix: speedup of getProductionRequestSummary RPC call

LHCbDIRAC Botrequested to merge
cherry-pick-965e123ed-devel into devel

BEGINRELEASENOTES

*ProductionManagement FIX: speedUp of getProductionRequestSummary RPC call (for MCExtensionAgent)

ENDRELEASENOTES

Merge request reports