in_xbee: Support another payload format
in_xbee: Support another payload format

in_xbee now recoginize [ time, { key => val, ... } ] format.

Signed-off-by: Takeshi HASEGAWA <80595b5c49522665976d35e515d02ac963124d00@gmail.com>

fluent/fluent-bit,takahasi/fluent-bit,hasegaw/fluent-bit,takahasi/fluent-bit,fluent/fluent-bit,viirya/fluent-bit,fluent/fluent-bit,pandax381/fluent-bit,nokute78/fluent-bit,hasegaw/fluent-bit,pandax381/fluent-bit,viirya/fluent-bit,takahasi/fluent-bit,fluent/fluent-bit,nokute78/fluent-bit,takahasi/fluent-bit,pandax381/fluent-bit,takahasi/fluent-bit,LogInsight/fluent-bit,viirya/fluent-bit,viirya/fluent-bit,nokute78/fluent-bit,takahasi/fluent-bit,nokute78/fluent-bit,nokute78/fluent-bit,viirya/fluent-bit,fluent/fluent-bit,fluent/fluent-bit,fluent/fluent-bit,pandax381/fluent-bit,nokute78/fluent-bit,nokute78/fluent-bit,viirya/fluent-bit,pandax381/fluent-bit,hasegaw/fluent-bit,nokute78/fluent-bit,hasegaw/fluent-bit,viirya/fluent-bit,fluent/fluent-bit,viirya/fluent-bit,hasegaw/fluent-bit,pandax381/fluent-bit,LogInsight/fluent-bit,LogInsight/fluent-bit,nokute78/fluent-bit,LogInsight/fluent-bit,hasegaw/fluent-bit,nokute78/fluent-bit,takahasi/fluent-bit,takahasi/fluent-bit,pandax381/fluent-bit,fluent/fluent-bit,LogInsight/fluent-bit,LogInsight/fluent-bit,fluent/fluent-bit,hasegaw/fluent-bit,LogInsight/fluent-bit,fluent/fluent-bit,nokute78/fluent-bit,fluent/fluent-bit,pandax381/fluent-bit,LogInsight/fluent-bit,hasegaw/fluent-bit,nokute78/fluent-bit