fixup ruby tests #316

Job	Run time
Apache2 tests on Linux	2m 17s
Apache2 tests on macOS	2m 34s
C++ tests on Linux	1m 22s
C++ tests on macOS	3m 56s
Homebrew packaging tests	6m 37s
Nginx tests on Linux	2m 22s
Nginx dynamic module tests on Linux	1m 9s
Nginx tests on macOS	2m 50s
Nginx dynamic module tests on macOS	1m 4s
Node.js tests on Linux	15s
Node.js tests on macOS	31s
Ruby tests on Linux	1m 10s
Source packaging tests	25s
Passenger Standalone tests on Linux	3m 4s
Ruby tests on macOS	1m 7s
Passenger Standalone tests on macOS	4m 6s
	34m 49s

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