Adding WaitAvailable to EFCore extensions

AMWD.Common.EntityFrameworkCore/Utilities/DatabaseMigrationOptions.cs

@@ -1,4 +1,5 @@
-using System.Reflection;
+using System;
+using System.Reflection;
 using Microsoft.Extensions.Logging;
 
 namespace Microsoft.EntityFrameworkCore
@@ -27,5 +28,10 @@ namespace Microsoft.EntityFrameworkCore
 		/// Gets or sets the source assembly for embedded files.
 		/// </summary>
 		public Assembly SourceAssembly { get; set; }
+
+		/// <summary>
+		/// Gets or sets a delay to wait before a connect retry.
+		/// </summary>
+		public TimeSpan WaitDelay { get; set; } = TimeSpan.FromSeconds(1);
 	}
 }