PHRAS-4007: Auth provider - add keycloak provider - openid #908

Job	Run time
build phraseanet-worker / build	4m 8s
build phraseanet-setup / build	3m 36s
build phraseanet-nginx / build	2m 42s
build phraseanet-fpm / build	4m 4s
build phraseanet-db / build	23s
build phraseanet-elasticsearch / build	23s
unit test	4m 33s
	19m 49s

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