[PCB Print][Fixed] Layer handling issues #2636

Job	Run time
test_indep	5m 46s
test (ki5, g1)	5m 10s
test (ki5, g2)	4m 7s
test (ki5, g3)	3m 28s
test (ki6, g1)	5m 58s
test (ki6, g2)	5m 47s
test (ki6, g3)	4m 44s
test (ki7, g1)	6m 34s
test (ki7, g2)	6m 20s
test (ki7, g3)	5m 49s
test (ki8, g1)	6m 51s
test (ki8, g2)	6m 7s
test (ki8, g3)	6m 10s
Triggers the docker images creation	1s
Finish Coveralls	4s
Consolidate coverage data	1m 2s
	1h 13m 58s

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