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/utilities/users-action/UsersActionComponent.ts b/src/app/utilities/users-action/UsersActionComponent.ts
index 799779d..a7b4c24 100644
--- a/src/app/utilities/users-action/UsersActionComponent.ts
+++ b/src/app/utilities/users-action/UsersActionComponent.ts
@@ -18,7 +18,6 @@
 /**
  * @file Users Action Component
  */
-import { isNullOrUndefined } from 'util';
 import { Component, Injector } from '@angular/core';
 import { NgbModal, NgbModalRef } from '@ng-bootstrap/ng-bootstrap';
 import { TranslateService } from '@ngx-translate/core';
@@ -26,7 +25,7 @@
 import { MODALCLOSERESPONSEDATA } from 'CommonModel';
 import { DeleteComponent } from 'DeleteComponent';
 import { ProjectRoleComponent } from 'ProjectRoleComponent';
-import { SharedService } from 'SharedService';
+import { SharedService, isNullOrUndefined } from 'SharedService';
 import { UserData } from 'UserModel';
 import { WarningComponent } from 'WarningComponent';
 /**