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-detail/cost-centre-detail.component.spec.ts

@@ -1,4 +1,6 @@
 import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { ReactiveFormsModule } from '@angular/forms';
+import { RouterTestingModule } from '@angular/router/testing';
 
 import { CostCentreDetailComponent } from './cost-centre-detail.component';
 
@@ -8,6 +10,7 @@ describe('CostCentreDetailComponent', () => {
 
   beforeEach(async(() => {
     TestBed.configureTestingModule({
+      imports: [ReactiveFormsModule, RouterTestingModule],
       declarations: [CostCentreDetailComponent],
     }).compileComponents();
   }));