appgw listener bug fix

Author: akshaysngupta

src/ResourceManager/Network/Commands.Network/ApplicationGateway/HttpListener/AzureApplicationGatewayHttpListenerBase.cs

@@ -108,14 +108,19 @@ public PSApplicationGatewayHttpListener NewObject()
             httpListener.Protocol = this.Protocol;
             httpListener.HostName = this.HostName;
 
-            if(string.Equals(this.RequireServerNameIndication,"true", StringComparison.OrdinalIgnoreCase))
+            if (string.Equals(this.RequireServerNameIndication, "true", StringComparison.OrdinalIgnoreCase))
             {
                 httpListener.RequireServerNameIndication = true;
             }
-            else if(string.Equals(this.RequireServerNameIndication, "false", StringComparison.OrdinalIgnoreCase))
+            else if (string.Equals(this.RequireServerNameIndication, "false", StringComparison.OrdinalIgnoreCase))
             {
                 httpListener.RequireServerNameIndication = false;
             }
+            else if (string.Equals(this.Protocol, "https", StringComparison.OrdinalIgnoreCase) && !string.IsNullOrEmpty(this.HostName))
+            {
+                // Set default as true to be at parity with portal.
+                httpListener.RequireServerNameIndication = true;
+            }
 
             if (!string.IsNullOrEmpty(this.FrontendIPConfigurationId))
             {