tweak: min 30 alive players for lone op #594

Job	Run time
Run Linters	2m 34s
Collect data for other tasks	18s
Windows Build	1m 36s
Compile Maps	2m 18s
Integration Tests (birdshot) / run_integration_tests	8m 50s
Integration Tests (deltastation) / run_integration_tests	9m 2s
Integration Tests (gateway_test) / run_integration_tests	9m 55s
Integration Tests (icebox) / run_integration_tests	9m 17s
Integration Tests (metastation) / run_integration_tests	8m 38s
Integration Tests (multiz_debug) / run_integration_tests	7m 57s
Integration Tests (northstar) / run_integration_tests	9m 42s
Integration Tests (runtimestation) / run_integration_tests	8m 13s
Integration Tests (tramstation) / run_integration_tests	9m 0s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	7m 39s
Check Alternate Tests	1s
Compare Screenshot Tests	14s
	1h 35m 14s

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