address comments about only finding routeable processes #276

Job	Run time
C++ tests on macOS	3m 59s
Nginx tests on Linux	2m 5s
Nginx dynamic module tests on Linux	1m 6s
Passenger Standalone tests on Linux	4m 9s
Nginx dynamic module tests on macOS	2m 3s
Nginx tests on macOS	3m 13s
Passenger Standalone tests on macOS	4m 55s
Homebrew packaging tests	7m 1s
Node.js tests on Linux	19s
Node.js tests on macOS	25s
Ruby tests on Linux	1m 7s
Ruby tests on macOS	1m 6s
Source packaging tests	25s
Apache2 tests on Linux	2m 24s
Apache2 tests on macOS	2m 20s
C++ tests on Linux	1m 29s
	38m 6s

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