Add SCCNonlinearProblem #471

Job	Run time
Tests (1, Core) / Tests - Core	8m 54s
Tests (1, Python) / Tests - Python	18m 19s
Tests (1, Downstream) / Tests - Downstream	37m 32s
Tests (1, QA) / Tests - QA	8m 23s
Tests (lts, Core) / Tests - Core	12m 1s
Tests (lts, Downstream) / Tests - Downstream	31m 33s
Tests (lts, Python) / Tests - Python	11m 5s
Tests (lts, QA) / Tests - QA	9m 1s
Tests (pre, Downstream) / Tests - Downstream	35m 52s
Tests (pre, Core) / Tests - Core	11m 27s
Tests (pre, Python) / Tests - Python	19m 1s
Tests (pre, QA) / Tests - QA	5m 50s
	3h 28m 58s

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