Merge pull request #2084 from cardstack/polymorphic-field-example #4456

Job	Run time
Host Tests (1, 6)	6m 22s
Host Tests (2, 6)	10m 21s
Host Tests (3, 6)	8m 25s
Host Tests (4, 6)	11m 39s
Host Tests (5, 6)	8m 17s
Host Tests (6, 6)	10m 53s
Merge Host reports and publish	1m 2s
	56m 59s

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