cmd/scollector: google_analytics: Limit the number of sources we record.
cmd/scollector: google_analytics: Limit the number of sources we record.

csmith-palantir/bosun,TrentScholl/bosun,alienth/bosun,melifaro/bosun,seekingalpha/bosun,augporto/bosun,leapar/bosun,leapar/bosun,TrentScholl/bosun,mhenderson-so/bosun,alienth/bosun,simnv/bosun,leapar/bosun,csmith-palantir/bosun,TrentScholl/bosun,seekingalpha/bosun,melifaro/bosun,simnv/bosun,alienth/bosun,mhenderson-so/bosun,bosun-monitor/bosun,TrentScholl/bosun,leapar/bosun,augporto/bosun,bookingcom/bosun,alienth/bosun,melifaro/bosun,csmith-palantir/bosun,bosun-monitor/bosun,bookingcom/bosun,bookingcom/bosun,augporto/bosun,seekingalpha/bosun,bookingcom/bosun,TrentScholl/bosun,simnv/bosun,bosun-monitor/bosun,csmith-palantir/bosun,augporto/bosun,melifaro/bosun,csmith-palantir/bosun,seekingalpha/bosun,mhenderson-so/bosun,mhenderson-so/bosun,bookingcom/bosun,leapar/bosun,leapar/bosun,bosun-monitor/bosun,TrentScholl/bosun,seekingalpha/bosun,mhenderson-so/bosun,alienth/bosun,bookingcom/bosun,csmith-palantir/bosun,melifaro/bosun,augporto/bosun,simnv/bosun,mhenderson-so/bosun,alienth/bosun,bosun-monitor/bosun,seekingalpha/bosun,simnv/bosun,melifaro/bosun,simnv/bosun,bosun-monitor/bosun,augporto/bosun