refactoring in progress #7

Job	Run time
build (16, esgn/pgtuned-testing:16, esgn/pgtuned-testing:latest)	17s
build (16, 3, esgn/pgtuned-testing:16-3, esgn/pgtuned-testing:postgis-latest)	50s
build (15, esgn/pgtuned-testing:15)	18s
build (15, 3, esgn/pgtuned-testing:15-3)	45s
build (14, esgn/pgtuned-testing:14)	17s
build (14, 3, esgn/pgtuned-testing:14-3)	50s
build (13, esgn/pgtuned-testing:13)	17s
build (13, 3, esgn/pgtuned-testing:13-3)	50s
build (12, esgn/pgtuned-testing:12)	27s
build (12, 3, esgn/pgtuned-testing:12-3)	43s
build (11-bullseye, esgn/pgtuned-testing:11)	18s
build (11-bullseye, 3, esgn/pgtuned-testing:11-3)	42s
build (11, 2.5, esgn/pgtuned-testing:11-2.5)	40s
build (10-bullseye, esgn/pgtuned-testing:10)	22s
build (10-bullseye, 3, esgn/pgtuned-testing:10-3)	40s
build (10, 2.5, esgn/pgtuned-testing:10-2.5)	38s
build (10, 2.4, esgn/pgtuned-testing:10-2.4)	44s
build (9.6-bullseye, esgn/pgtuned-testing:9.6)	23s
build (9.6-bullseye, 3, esgn/pgtuned-testing:9.6-3)	47s
build (9.6, 2.5, esgn/pgtuned-testing:9.6-2.5)	38s
build (9.6, 2.4, esgn/pgtuned-testing:9.6-2.4)	41s
build (9.6, 2.3, esgn/pgtuned-testing:9.6-2.3)	41s
build (9.5, esgn/pgtuned-testing:9.5)	22s
build (9.5, 3, esgn/pgtuned-testing:9.5-3)	40s
build (9.5, 2.5, esgn/pgtuned-testing:9.5-2.5)	39s
build (9.5, 2.4, esgn/pgtuned-testing:9.5-24)	47s
build (9.5, 2.3, esgn/pgtuned-testing:9.5-2.3)	42s
	15m 58s

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