organize services into services folder

src/app/http-interceptors/caching.interceptor.ts

@@ -9,7 +9,7 @@ import {
 } from '@angular/common/http';
 import { Observable, of } from 'rxjs';
 import { tap } from 'rxjs/operators';
-import { RequestCacheService } from '../request-cache.service'
+import { RequestCacheService } from '../services/request-cache.service'
 
 @Injectable()
 export class CachingInterceptor implements HttpInterceptor {

src/app/http-interceptors/csrf.interceptor.ts

@@ -4,7 +4,7 @@ import {
   HttpInterceptor, HttpHandler, HttpRequest, HttpHeaders
 } from '@angular/common/http';
 
-import { CookieService } from '../cookie.service';
+import { CookieService } from '../services/cookie.service';
 
 
 @Injectable()