Admin database and survey => WIP

...pp/admin/components/database/form-database.component.html

.../app/admin/components/database/form-database.component.ts

client/src/app/admin/components/database/index.ts

client/src/app/admin/components/index.ts

client/src/app/metamodel/store/actions/database.actions.ts

client/src/app/metamodel/store/actions/survey.actions.ts

client/src/app/metamodel/store/effects/database.effects.ts

client/src/app/metamodel/store/effects/survey.effects.ts

client/src/app/metamodel/store/reducers/database.reducer.ts

client/src/app/metamodel/store/reducers/survey.reducer.ts