Merge remote-tracking branch 'origin/bugfix/6678_ISISLiveData'
Merge remote-tracking branch 'origin/bugfix/6767_integrated_peaks'
Merge remote-tracking branch 'origin/feature/6826_indirect_c2e_nexus'
Workaround a bug on the Mac in Python DowncastRegistry. Refs #6832

Fixes the SNSPowerReduction system test on the Mac.
Merge branch 'bugfix/6832_mac_python_downcastbug' into develop