Admin reports

QA is happening as part of code review.

Indicator definitions: https://docs.google.com/a/dimagi.com/spreadsheets/d/1Ug09IcbogB9JyCIGS2vHV0kRTn2U_zO-Y9HRAinOpT0/edit#gid=1495052602

@emord @czue @esoergel 
I'm not 100% sure. This was moved from corehq/apps/reports/standard/domains.py and they were there. Do we know any reason why they may have been kept there?