Fix 'unknown locale' error message when viewing service plans

To reproduce..
- View the service's service plan table using a cost with amount in EUR
- Exception `Missing locale data for the locale "fr".` is thrown

This didn't happen on the create service stepper due to the locale being registered there.
Also didn't happen if visiting the service plan table after the stepper

src/frontend/packages/core/src/shared/components/list/list-types/service-plans/service-plans-list-config.service.ts

@@ -1,4 +1,5 @@
-import { DatePipe } from '@angular/common';
+import { DatePipe, registerLocaleData } from '@angular/common';
+import localeFr from '@angular/common/locales/fr';
 import { Injectable } from '@angular/core';
 import { Store } from '@ngrx/store';
 
@@ -24,8 +25,6 @@ import {
 
 
 /**
- * Service instance list shown for `service / service instances` component
- *
  * @export
  */
 @Injectable()
@@ -102,6 +101,7 @@ export class ServicePlansListConfigService implements IListConfig<APIResource<IS
     protected datePipe: DatePipe,
     servicesService: ServicesService
   ) {
+    registerLocaleData(localeFr);
     this.dataSource = new ServicePlansDataSource(servicesService.cfGuid, servicesService.serviceGuid, store, this);
   }