change get_db() to cls.get_db()
change get_db() to cls.get_db()

dimagi/commcare-hq,puttarajubr/commcare-hq,gmimano/commcaretest,gmimano/commcaretest,dimagi/commcare-hq,SEL-Columbia/commcare-hq,gmimano/commcaretest,puttarajubr/commcare-hq,qedsoftware/commcare-hq,dimagi/commcare-hq,qedsoftware/commcare-hq,puttarajubr/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,puttarajubr/commcare-hq,SEL-Columbia/commcare-hq,SEL-Columbia/commcare-hq,qedsoftware/commcare-hq,qedsoftware/commcare-hq,qedsoftware/commcare-hq