ME: return empty string when START_TIME/END_TIME not found; prevents tests from failing
ME: return empty string when START_TIME/END_TIME not found; prevents tests from failing

qlands/onadata,GeoODK/onadata,spatialdev/onadata,GeoODK/onadata,smn/onadata,hnjamba/onaclone,hnjamba/onaclone,qlands/onadata,sounay/flaminggo-test,smn/onadata,hnjamba/onaclone,sounay/flaminggo-test,smn/onadata,spatialdev/onadata,GeoODK/onadata,spatialdev/onadata,piqoni/onadata,GeoODK/onadata,sounay/flaminggo-test,smn/onadata,qlands/onadata,piqoni/onadata,piqoni/onadata,hnjamba/onaclone,sounay/flaminggo-test,piqoni/onadata,spatialdev/onadata,qlands/onadata