fix: add OverrideType property to TieLineConfig

The TielineConfig had no property for the `type` property from an Essentials configuration file to be deserialized into. This has been corrected so that the `type` property in a Tieline JSON configuration is now respected and used to build the tieline.

src/PepperDash.Essentials.Core/Routing/TieLine.cs

@@ -57,6 +57,16 @@ namespace PepperDash.Essentials.Core
             DestinationPort = destinationPort;
         }
 
+        /// <summary>
+        /// Creates a tie line with an overriding Type.  See help for OverrideType property for info
+        /// </summary>
+        /// <param name="overrideType">The signal type to limit the link to. Overrides DestinationPort.Type</param>
+        public TieLine(RoutingOutputPort sourcePort, RoutingInputPort destinationPort, eRoutingSignalType? overrideType) :
+            this(sourcePort, destinationPort)
+        {
+            OverrideType = overrideType;
+        }
+
         /// <summary>
         /// Creates a tie line with an overriding Type.  See help for OverrideType property for info
         /// </summary>

src/PepperDash.Essentials.Core/Routing/TieLineConfig.cs

@@ -7,6 +7,7 @@ using Crestron.SimplSharp.CrestronIO;
 using Crestron.SimplSharpPro;
 
 using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
 using Newtonsoft.Json.Linq;
 using PepperDash.Core;
 using PepperDash.Essentials.Core;
@@ -23,6 +24,10 @@ namespace PepperDash.Essentials.Core.Config
 		public string DestinationCard { get; set; }
 		public string DestinationPort { get; set; }
 
+        [JsonProperty("type", NullValueHandling = NullValueHandling.Ignore)]
+        [JsonConverter(typeof(StringEnumConverter))]
+        public eRoutingSignalType? OverrideType { get; set; }
+
 		/// <summary>
 		/// Returns the appropriate tie line for either a card-based device or 
 		/// regular device with ports on-device.
@@ -65,7 +70,7 @@ namespace PepperDash.Essentials.Core.Config
 					return null;
 				}            
 
-			return new TieLine(sourceOutputPort, destinationInputPort);
+			return new TieLine(sourceOutputPort, destinationInputPort, OverrideType);
 		}
 
 		void LogError(string msg)