CI/CD

lint: Fix rubocop offenses #651

Job	Run time
Lint code	4m 41s
Tests (0-2)	12m 24s
System tests (0-4)	10m 37s
TODO	11s
Tests (1-2)	9m 33s
System tests (1-4)	12m 55s
System tests (2-4)	13m 9s
Test build docker image	13m 10s
System tests (3-4)	12m 6s
Generate release	0s
Build and push image to Registry	0s
Deploy staging branch on staging instance	0s
Deploy rc branch on RC instance	0s
Deploy develop branch on develop instance	0s
	1h 28m 46s

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