Fix 301 and 302 redirects. (#6001) #14977

Job	Run time
Coresandbox (16.x, 3.7)	3m 59s
Core Basic (14.x)	7m 50s
Core Basic - Plone 5 (16.x)	7m 59s
Core Basic (16.x)	8m 3s
Core Blocks (14.x)	11m 8s
Core Basic (18.x)	7m 52s
Core Blocks (16.x)	10m 53s
Core Volto Slate (14.x)	8m 20s
Core Blocks (18.x)	9m 29s
Guillotina (16.x)	3m 31s
Core Volto Slate (16.x)	8m 23s
Core Volto Slate (18.x)	8m 13s
Multilingual (16.x)	3m 23s
Project Generator (16.x)	4m 41s
Project Generator (18.x)	4m 38s
Seamless Mode (16.x)	8m 13s
Multilingual in Seamless Mode (18.x)	3m 6s
Working Copy (16.x)	3m 5s
	2h 2m 46s

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