Add conditions on signage (refs #3847) #2564

Job	Run time
Build docker image	7m 25s
Build 20.04 package	3m 37s
Python Unittests (bionic-3.8, 3.8, tests)	16m 47s
Build 18.04 package	3m 16s
Python Unittests (bionic-3.8, 3.8, tests_nds)	15m 28s
Python Unittests (focal-3.8, 3.8, tests)	15m 50s
Python Unittests (focal-3.8, 3.8, tests_nds)	14m 32s
Tests E2E 20.04	6m 34s
Tests E2E docker	8m 54s
Publish (on release only)	0s
	1h 32m 23s

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