add lb removal logic

diff --git a/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/resource/NsxResource.java b/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/resource/NsxResource.java
index ec4de6b..bf16b05 100644
--- a/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/resource/NsxResource.java
+++ b/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/resource/NsxResource.java

@@ -308,7 +308,9 @@
 
     private Answer executeRequest(DeleteNsxTier1GatewayCommand cmd) {
         String tier1Id = NsxControllerUtils.getTier1GatewayName(cmd.getDomainId(), cmd.getAccountId(), cmd.getZoneId(), cmd.getNetworkResourceId(), cmd.isResourceVpc());
+        String lbName = NsxControllerUtils.getLoadBalancerName(tier1Id);
         try {
+            nsxApiClient.deleteLoadBalancer(lbName);
             nsxApiClient.deleteTier1Gateway(tier1Id);
         } catch (Exception e) {
             return new NsxAnswer(cmd, new CloudRuntimeException(e.getMessage()));

diff --git a/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/service/NsxApiClient.java b/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/service/NsxApiClient.java
index cdcb83e..cb81a73 100644
--- a/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/service/NsxApiClient.java
+++ b/plugins/network-elements/nsx/src/main/java/org/apache/cloudstack/service/NsxApiClient.java

@@ -707,8 +707,7 @@
             LBPoolListResult lbPoolListResult = lbPools.list(null, null, null, null, null, null);
             if (CollectionUtils.isEmpty(lbVsListResult.getResults()) && CollectionUtils.isEmpty(lbPoolListResult.getResults())) {
                 String lbName = getLoadBalancerName(tier1GatewayName);
-                LbServices lbServices = (LbServices) nsxService.apply(LbServices.class);
-                lbServices.delete(lbName, true);
+                deleteLoadBalancer(lbName);
             }
 
         } catch (Error error) {
@@ -719,6 +718,11 @@
         }
     }
 
+    public void deleteLoadBalancer(String lbName) {
+        LbServices lbServices = (LbServices) nsxService.apply(LbServices.class);
+        lbServices.delete(lbName, true);
+    }
+
     private String getLbPoolPath(String lbPoolName) {
         try {
             LbPools lbPools = (LbPools) nsxService.apply(LbPools.class);

diff --git a/ui/src/views/network/VpcTiersTab.vue b/ui/src/views/network/VpcTiersTab.vue
index 755c84f..e06feae 100644
--- a/ui/src/views/network/VpcTiersTab.vue
+++ b/ui/src/views/network/VpcTiersTab.vue

@@ -463,7 +463,8 @@
     },
     async showIlb (network) {
       const networkOffering = await this.getNetworkOffering(network.networkofferingid)
-      return ((networkOffering.supportsinternallb && network.service.filter(s => (s.name === 'Lb') && (s.capability.filter(c => c.name === 'LbSchemes' && c.value.split(',').includes('Internal')).length > 0)).length > 0)) 
+      console.log((networkOffering.supportsinternallb && network.service.filter(s => (s.name === 'Lb') && (s.capability.filter(c => c.name === 'LbSchemes' && c.value.split(',').includes('Internal')).length > 0)).length > 0))
+      return ((networkOffering.supportsinternallb && network.service.filter(s => (s.name === 'Lb') && (s.capability.filter(c => c.name === 'LbSchemes' && c.value.split(',').includes('Internal')).length > 0)).length > 0)) || false
     },
     updateMtu () {
       if (this.form.privatemtu > this.privateMtuMax) {