UK: add id field to MetaDataSerializer
UK: add id field to MetaDataSerializer

jomolinare/kobocat,kobotoolbox/kobocat,mainakibui/kobocat,qlands/onadata,qlands/onadata,smn/onadata,GeoODK/onadata,hnjamba/onaclone,jomolinare/kobocat,sounay/flaminggo-test,kobotoolbox/kobocat,sounay/flaminggo-test,awemulya/fieldsight-kobocat,hnjamba/onaclone,mainakibui/kobocat,sounay/flaminggo-test,jomolinare/kobocat,awemulya/fieldsight-kobocat,piqoni/onadata,spatialdev/onadata,piqoni/onadata,qlands/onadata,jomolinare/kobocat,GeoODK/onadata,spatialdev/onadata,awemulya/fieldsight-kobocat,sounay/flaminggo-test,smn/onadata,smn/onadata,GeoODK/onadata,hnjamba/onaclone,spatialdev/onadata,GeoODK/onadata,kobotoolbox/kobocat,mainakibui/kobocat,qlands/onadata,mainakibui/kobocat,spatialdev/onadata,hnjamba/onaclone,awemulya/fieldsight-kobocat,smn/onadata,piqoni/onadata,piqoni/onadata,kobotoolbox/kobocat