placeholders for multi-z nanomaps #404

Job	Run time
Run Linters	2m 29s
Collect data for other tasks	11s
Windows Build	1m 39s
Compile Maps	2m 16s
Integration Tests (birdshot) / run_integration_tests	8m 39s
Integration Tests (deltastation) / run_integration_tests	8m 56s
Integration Tests (gateway_test) / run_integration_tests	9m 26s
Integration Tests (icebox) / run_integration_tests	8m 49s
Integration Tests (metastation) / run_integration_tests	8m 38s
Integration Tests (multiz_debug) / run_integration_tests	7m 46s
Integration Tests (northstar) / run_integration_tests	9m 30s
Integration Tests (runtimestation) / run_integration_tests	7m 41s
Integration Tests (tramstation) / run_integration_tests	8m 59s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	7m 34s
Check Alternate Tests	1s
Compare Screenshot Tests	18s
	1h 32m 52s

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