Oracle create scripts: tm_activity can be NULL
Add tm_activity to mysql create scripts
Add OverflowFlag to earlyDashboardMonitoring report in CMSRunAnalysis.py.
Merge pull request #4456 from AndresTanasijczuk/overflowflag

Add OverflowFlag to earlyDashboardMonitoring report in CMSRunAnalysis.py. Fixes #4424.