Tests

Merge pull request #507 from SciML/ChrisRackauckas-patch-1 #278

Job	Run time
Tests (pre, JET) / Tests - JET	4m 50s
Tests (1, Core) / Tests - Core	7m 43s
Tests (1, JET) / Tests - JET	5m 18s
Tests (lts, JET) / Tests - JET	2m 39s
Tests (pre, Core) / Tests - Core	7m 10s
Tests (lts, Core) / Tests - Core	4m 21s
Tests (pre, Downstream) / Tests - Downstream	20m 28s
Tests (1, Downstream) / Tests - Downstream	18m 44s
Tests (lts, Downstream) / Tests - Downstream	10m 35s
	1h 21m 48s

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