Removed old rules from eslint

Tried hand at testing by fixing the spec files with import. However, still many errors and given up now.

overlord/src/app/cost-centre/cost-centre-resolver.service.spec.ts

@@ -1,18 +1,18 @@
 import { inject, TestBed } from '@angular/core/testing';
+import { HttpClientModule } from '@angular/common/http';
+import { RouterTestingModule } from '@angular/router/testing';
 
-import { CostCentreResolverService } from './cost-centre-resolver.service';
+import { CostCentreResolver } from './cost-centre-resolver.service';
 
-describe('CostCentreResolverService', () => {
+describe('CostCentreResolver', () => {
   beforeEach(() => {
     TestBed.configureTestingModule({
-      providers: [CostCentreDetailResolverService],
+      imports: [HttpClientModule, RouterTestingModule],
+      providers: [CostCentreResolver],
     });
   });
 
-  it('should be created', inject(
-    [CostCentreDetailResolverService],
-    (service: CostCentreDetailResolverService) => {
-      expect(service).toBeTruthy();
-    },
-  ));
+  it('should be created', inject([CostCentreResolver], (service: CostCentreResolver) => {
+    expect(service).toBeTruthy();
+  }));
 });