[CX] Failure to parse records with number value larger than Long.MAX_VALUE

If the record being parse containers a numeric (non-double) value larger than Long.MAX_VALUE, then it fails to be processed. Below is the processing failure reported message:

"details": "Parsing error at field 'long': Numeric value (999999999999999999999999999999999) out of range of long (-9223372036854775808 - 9223372036854775807)\n at [Source: (com.couchbase.analytics.util.ByteBufInputStream); line: 1, column: -1]"

This behavior leads to a query failure for external datasets reading JSON data as failing to parse the record would fail the whole operation