refactor: Clients Module

- refactors clients-routing.module.ts for dynamic breadcrumbs.
- refactors clients.service.ts to use HttpClient
- adds resolver to load client data
- removes partially implemented components

fixes: #409

src/app/clients/common-resolvers/clients.resolver.ts

@@ -0,0 +1,30 @@
+/** Angular Imports */
+import { Injectable } from '@angular/core';
+import { Resolve, ActivatedRouteSnapshot } from '@angular/router';
+
+/** rxjs Imports */
+import { Observable } from 'rxjs';
+
+/** Custom Services */
+import { ClientsService } from '../clients.service';
+
+/**
+ * Clients data resolver.
+ */
+@Injectable()
+export class ClientsResolver implements Resolve<Object> {
+
+    /**
+     * @param {ClientsService} ClientsService Clients service.
+     */
+    constructor(private clientsService: ClientsService) { }
+
+    /**
+     * Returns the Clients data.
+     * @returns {Observable<any>}
+     */
+    resolve(): Observable<any> {
+        return this.clientsService.getClients();
+    }
+
+}