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/packages/instantiate-net-slice-template/InstantiateNetSliceTemplateComponent.ts b/src/app/packages/instantiate-net-slice-template/InstantiateNetSliceTemplateComponent.ts
index fb0abda..ab8b72f 100644
--- a/src/app/packages/instantiate-net-slice-template/InstantiateNetSliceTemplateComponent.ts
+++ b/src/app/packages/instantiate-net-slice-template/InstantiateNetSliceTemplateComponent.ts
@@ -18,7 +18,6 @@
 /**
  * @file Instantiate NS Modal Component.
  */
-import { isNullOrUndefined } from 'util';
 import { HttpHeaders } from '@angular/common/http';
 import { Component, ElementRef, Injector, OnInit, ViewChild } from '@angular/core';
 import { FormBuilder, FormGroup, Validators } from '@angular/forms';
@@ -33,7 +32,7 @@
 import { NetworkSliceData } from 'NetworkSliceModel';
 import { NSICREATEPARAMS } from 'NSDModel';
 import { RestService } from 'RestService';
-import { SharedService } from 'SharedService';
+import { SharedService, isNullOrUndefined } from 'SharedService';
 import { VimAccountDetails } from 'VimAccountModel';
 /**
  * Creating component