Feat/add circulation model - #3578 #2551

Job	Run time
Build 18.04 package	3m 56s
Build docker image	6m 50s
Python Unittests (bionic-3.8, 3.8, tests)	17m 16s
Python Unittests (bionic-3.8, 3.8, tests_nds)	21m 31s
Build 20.04 package	4m 32s
Python Unittests (focal-3.8, 3.8, tests)	17m 0s
Python Unittests (focal-3.8, 3.8, tests_nds)	15m 20s
Tests E2E 20.04	7m 2s
Tests E2E docker	7m 53s
Publish (on release only)	0s
	1h 41m 20s

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