Update OTP-26, OTP-27, OTP-28 (#511) #452

Job	Run time
docker (DIR=28)	4m 6s
docker (DIR=28 VARIANT=alpine)	3m 28s
docker (DIR=28 VARIANT=slim)	3m 10s
docker (DIR=27 VARIANT=alpine)	3m 6s
docker (DIR=master VARIANT=alpine)	6m 45s
docker (DIR=27 VARIANT=slim)	2m 53s
docker (DIR=27)	3m 49s
docker (DIR=26 VARIANT=slim)	7m 5s
docker (DIR=26 VARIANT=alpine)	7m 48s
docker (DIR=master)	20s
docker (DIR=25 VARIANT=alpine)	6m 58s
docker (DIR=25 VARIANT=slim)	6m 4s
docker (DIR=26)	12m 25s
docker (DIR=25)	11m 11s
	1h 19m 8s

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