Refactor lib/private/App #1237

Job	Run time
changes	7s
integration-sqlite (capabilities_features, 8.2, main)	4m 19s
integration-sqlite (collaboration_features, 8.2, main)	5m 52s
integration-sqlite (comments_features, 8.2, main)	1m 44s
integration-sqlite (dav_features, 8.2, main)	4m 13s
integration-sqlite (features, 8.2, main)	15m 5s
integration-sqlite (federation_features, 8.2, main)	7m 38s
integration-sqlite (--tags ~@large files_features, 8.2, main)	6m 19s
integration-sqlite (filesdrop_features, 8.2, main)	4m 40s
integration-sqlite (openldap_features, 8.2, main)	4m 32s
integration-sqlite (openldap_numerical_features, 8.2, main)	1m 1s
integration-sqlite (ldap_features, 8.2, main)	5m 3s
integration-sqlite (remoteapi_features, 8.2, main)	4m 26s
integration-sqlite (setup_features, 8.2, main)	4m 16s
integration-sqlite (sharees_features, 8.2, main)	8m 58s
integration-sqlite (sharing_features, 8.2, main)	27m 56s
integration-sqlite (videoverification_features, 8.2, main)	3m 7s
integration-sqlite-summary	6s
	1h 49m 22s

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