Revert "Use intervals instead of daterange"
Revert "Use intervals instead of daterange"

This reverts commit 5f619ba79cb92c1f17fc76904abe451db9a1b0d0.

Conflicts:
	corehq/apps/hqadmin/reporting/reports.py

puttarajubr/commcare-hq,puttarajubr/commcare-hq,qedsoftware/commcare-hq,qedsoftware/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,qedsoftware/commcare-hq,puttarajubr/commcare-hq,qedsoftware/commcare-hq,qedsoftware/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,puttarajubr/commcare-hq