Simplified and refactored manual creation of remote data objects for tests

...ies/bitstream-formats/bitstream-formats.component.spec.ts

...ies/metadata-registry/metadata-registry.component.spec.ts

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

...browse-by-date-page/browse-by-date-page.component.spec.ts

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

...owse-by-title-page/browse-by-title-page.component.spec.ts

...eate-collection-page/create-collection-page.guard.spec.ts

...create-community-page/create-community-page.guard.spec.ts

...-list/community-page-sub-community-list.component.spec.ts

...app/+item-page/edit-item-page/edit-item-operators.spec.ts

.../edit-item-page/item-delete/item-delete.component.spec.ts

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

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

...dit-item-page/item-private/item-private.component.spec.ts

.../edit-item-page/item-public/item-public.component.spec.ts

...item-page/item-reinstate/item-reinstate.component.spec.ts

.../edit-item-page/item-status/item-status.component.spec.ts

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

...item-action/abstract-simple-item-action.component.spec.ts

...ield-components/collections/collections.component.spec.ts