Admin => add surveys and databases routes

...rc/app/admin/containers/survey/survey-list.component.html

.../src/app/admin/containers/survey/survey-list.component.ts

client/src/app/admin/containers/survey/survey.component.html

client/src/app/admin/containers/survey/survey.component.ts

client/src/app/auth/auth.effects.ts

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

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

...nt/src/app/metamodel/store/selectors/database.selector.ts

client/src/app/metamodel/store/selectors/survey.selector.ts

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

client/src/app/portal/components/portal-nav.component.html

client/src/app/portal/components/portal-nav.component.scss

client/src/app/portal/containers/portal-home.component.html

client/src/app/portal/containers/portal-home.component.ts

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

client/src/app/shared/components/navbar.component.html

client/src/app/shared/components/navbar.component.scss

client/src/app/shared/components/navbar.component.ts

client/src/app/shared/components/spinner.component.html

client/src/app/shared/components/spinner.component.ts