fix date in __str__ for indicators and add id to string
fix date in __str__ for indicators and add id to string

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