PHRAS-2069: integrate plugin metadataupdater to phraseanet #530

Job	Run time
build phraseanet-fpm / build	23s
build phraseanet-setup / build	37s
build phraseanet-db / build	34s
build phraseanet-nginx / build	40s
build phraseanet-worker / build	24s
build phraseanet-elasticsearch / build	32s
unit test	2m 16s
	5m 26s

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