Added http status text to rest response object and fixed tests

src/app/+search-page/search-service/search.service.spec.ts

src/app/core/auth/auth-response-parsing.service.spec.ts

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

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

src/app/core/cache/response-cache.models.ts

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

src/app/core/cache/response-cache.service.spec.ts

...core/data/browse-entries-response-parsing.service.spec.ts

src/app/core/data/browse-entries-response-parsing.service.ts

src/app/core/data/browse-response-parsing.service.spec.ts

src/app/core/data/browse-response-parsing.service.ts

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

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

src/app/core/data/dso-response-parsing.service.ts

src/app/core/data/endpoint-map-response-parsing.service.ts

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

...app/core/data/facet-value-map-response-parsing.service.ts

src/app/core/data/facet-value-response-parsing.service.ts

src/app/core/data/metadataschema-parsing.service.ts

...ata/registry-bitstreamformats-response-parsing.service.ts