PHRAS-2069: integrate plugin metadataupdater to phraseanet #536

Job	Run time
build phraseanet-fpm / build	3m 25s
build phraseanet-setup / build	4m 13s
build phraseanet-db / build	31s
build phraseanet-elasticsearch / build	20s
build phraseanet-nginx / build	2m 33s
build phraseanet-worker / build	3m 31s
unit test	9m 57s
	24m 30s

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