61949: finished refactoring, adding type doc

...ries/metadata-registry/metadata-registry.reducers.spec.ts

...tadata-schema-form/metadata-schema-form.component.spec.ts

...metadata-field-form/metadata-field-form.component.spec.ts

...istries/metadata-schema/metadata-schema.component.spec.ts

...y-metadata-page/browse-by-metadata-page.component.spec.ts

...edit-in-place-field/edit-in-place-field.component.spec.ts

...t-item-page/item-metadata/item-metadata.component.spec.ts

src/app/core/auth/auth.service.spec.ts

src/app/core/auth/models/auth-status.model.ts

src/app/core/auth/models/normalized-auth-status.model.ts

src/app/core/cache/builders/remote-data-build.service.ts

src/app/core/cache/models/normalized-object.model.ts

src/app/core/cache/object-cache.reducer.spec.ts

src/app/core/cache/object-cache.reducer.ts

src/app/core/cache/object-cache.service.ts

src/app/core/config/config-response-parsing.service.ts

src/app/core/config/models/config.model.ts

src/app/core/config/models/normalized-config.model.ts

src/app/core/core.module.ts

src/app/core/data/data.service.ts