[DOCs][Fixed] 1.8.1 docker images tag names #1

Job	Run time
test_indep	5m 41s
test (ki5, g1)	5m 5s
test (ki5, g2)	3m 42s
test (ki5, g3)	3m 28s
test (ki6, g1)	5m 40s
test (ki6, g2)	5m 25s
test (ki6, g3)	4m 25s
test (ki7, g1)	5m 58s
test (ki7, g2)	6m 37s
test (ki7, g3)	5m 54s
test (ki8, g1)	6m 15s
test (ki8, g2)	5m 43s
test (ki8, g3)	6m 13s
Finish Coveralls	3s
Triggers the docker images creation	0s
Consolidate coverage data	1m 19s
	1h 11m 28s

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