PHRAS-4062: admin users delete and request improvement #967

Job	Run time
build phraseanet-elasticsearch / build	31s
build phraseanet-elasticsearch / build	31s
build phraseanet-nginx / build	2m 45s
build phraseanet-nginx / build	2m 45s
build phraseanet-fpm / build	4m 17s
build phraseanet-fpm / build	4m 17s
build phraseanet-db / build	19s
build phraseanet-db / build	19s
build phraseanet-setup / build	3m 45s
build phraseanet-setup / build	3m 45s
build phraseanet-worker / build	4m 21s
build phraseanet-worker / build	4m 21s
unit test	2m 17s
unit test	5m 40s
	39m 53s

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