Rename metamodel part from att to attribute => DONE

src/app/detail/store/detail.effects.ts

src/app/metamodel/action/att.action.ts

src/app/metamodel/action/attribute.action.spec.ts

src/app/metamodel/action/attribute.action.ts

src/app/metamodel/effects/att.effects.ts

src/app/metamodel/effects/attribute.effects.ts

src/app/metamodel/effects/index.ts

src/app/metamodel/reducers/att.reducer.ts

src/app/metamodel/reducers/attribute.reducer.spec.ts

src/app/metamodel/reducers/attribute.reducer.ts

src/app/metamodel/reducers/index.ts

src/app/metamodel/selectors/att.selector.ts

src/app/metamodel/selectors/attribute.selector.spec.ts

src/app/metamodel/selectors/attribute.selector.ts

src/app/metamodel/selectors/index.ts

src/app/metamodel/services/att.service.ts

src/app/metamodel/services/attribute.service.ts

src/app/metamodel/services/index.ts

...rch-multiple/containers/result-multiple.component.spec.ts

...p/search-multiple/containers/result-multiple.component.ts