Permit individual perf test duration to be set#468

StuartWheater wants to merge 2 commits intodatashield:v6.3.6-devdatashield/dsBase:v6.3.6-devfrom

StuartWheater:v6.3.6-dev_feat-perf-supportStuartWheater/dsBase:v6.3.6-dev_feat-perf-supportCopy head branch name to clipboard