[exporter/awsxray] Add aws sdk http error events to x-ray subsegment … #503

Job	Run time
windows-unittest-matrix (receiver-0)	29m 43s
windows-unittest-matrix (receiver-1)	29m 36s
windows-unittest-matrix (processor)	17m 16s
windows-unittest-matrix (exporter)	29m 53s
windows-unittest-matrix (extension)	14m 20s
windows-unittest-matrix (internal)	16m 28s
windows-unittest-matrix (pkg)	10m 10s
windows-unittest-matrix (cmd)	29m 58s
windows-unittest-matrix (other)	29m 50s
windows-unittest	0s
	3h 27m 14s

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