Angular upgrade

	- Upgraded Angular from 14 to 15 version.

Change-Id: I2339a04020153cbc9ed7a14bfe8e0aa265e507da
Signed-off-by: SANDHYA.JS <sandhya.j@tataelxsi.co.in>
diff --git a/src/app/roles/roles-details/RolesDetailsComponent.ts b/src/app/roles/roles-details/RolesDetailsComponent.ts
index 9c2e3e3..473a0c6 100644
--- a/src/app/roles/roles-details/RolesDetailsComponent.ts
+++ b/src/app/roles/roles-details/RolesDetailsComponent.ts
@@ -18,7 +18,6 @@
 /**
  * @file Roles Deatils component.
  */
-import { isNullOrUndefined } from 'util';
 import { Component, Injector, OnInit } from '@angular/core';
 import { Router } from '@angular/router';
 import { TranslateService } from '@ngx-translate/core';
@@ -30,7 +29,7 @@
 import { RolesActionComponent } from 'RolesAction';
 import { RoleData, RoleDetails } from 'RolesModel';
 import { Subscription } from 'rxjs';
-import { SharedService } from 'SharedService';
+import { SharedService, isNullOrUndefined } from 'SharedService';
 
 /**
  * Creating component