PHRAS-2069 rescan file metadata command (#4420) #565

Job	Run time
build phraseanet-db / build	20s
build phraseanet-nginx / build	3m 10s
build phraseanet-fpm / build	4m 26s
build phraseanet-elasticsearch / build	24s
build phraseanet-worker / build	4m 53s
build phraseanet-setup / build	3m 27s
unit test	10m 50s
	27m 30s

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