68405: javadoc, test, and cleanup

src/app/+community-page/community-page.resolver.spec.ts

src/app/+item-page/edit-item-page/edit-item-page.module.ts

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

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

src/app/core/data/comcol-data.service.spec.ts

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

src/app/core/data/request.reducer.spec.ts

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

src/app/core/data/resource-policy.service.spec.ts

src/app/shared/testing/test-module.ts