Change test to expect Ginco passing stage 3

This started working again after commit
b5763c7

Author: Owen Jones

regression/genuine_benchmarks/test_genuine_benchmarks.py

@@ -50,7 +50,7 @@ def test_ginco(tmpdir):
 
     expectation.check_stage_1(succeeded=True)
     expectation.check_stage_2(succeeded=True)
-    expectation.check_stage_3(succeeded=False)
+    expectation.check_stage_3(succeeded=True)
     expectation.check_timed_out(timed_out=False)