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/operational-view/operational-view-app-actions/OperationalViewAppActionsComponent.ts b/src/app/operational-view/operational-view-app-actions/OperationalViewAppActionsComponent.ts
index acee5ed..f622dbd 100644
--- a/src/app/operational-view/operational-view-app-actions/OperationalViewAppActionsComponent.ts
+++ b/src/app/operational-view/operational-view-app-actions/OperationalViewAppActionsComponent.ts
@@ -19,10 +19,10 @@
 /**
  * @file Page for Operational View App actions Component
  */
-import { isNullOrUndefined } from 'util';
 import { Component, Injector, Input, OnInit } from '@angular/core';
 import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
 import { URLPARAMS } from 'CommonModel';
+import { isNullOrUndefined } from 'SharedService';
 /**
  * Creating component
  * @Component takes OperationalViewAppActionsComponent.html as template url