Merge pull request #511 from llaniewski/remove/cpp17 #297

Job	Run time
test (d2q9, float, same, true)	5m 18s
test (d2q9, float, same, false)	5m 16s
test (d2q9, float, half, true)	5m 55s
test (d2q9, float, half-shift, true)	5m 2s
test (d2q9, float, float, true)	5m 46s
test (d2q9, float, float, false)	5m 27s
test (d2q9, float, float-shift, true)	5m 27s
test (d2q9, float, float-shift, false)	4m 55s
test (d2q9, double, same, true)	5m 29s
test (d2q9, double, same, false)	5m 5s
test (d2q9, double, half, true)	5m 15s
test (d2q9, double, half-shift, true)	4m 54s
test (d2q9, double, float, true)	4m 56s
test (d2q9, double, float, false)	4m 42s
test (d2q9, double, float-shift, true)	5m 19s
test (d2q9, double, float-shift, false)	4m 55s
test (d2q9, double, double, true)	5m 5s
test (d2q9, double, double, false)	4m 51s
	1h 33m 37s

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