启动时休眠时间调整为可配置项

C#/source/Yitter.IdGenerator/Contract/IdGeneratorOptions.cs

@@ -78,6 +78,10 @@ namespace Yitter.IdGenerator
         /// </summary>
         public virtual byte TimestampType { get; set; } = 0;
 
+        /// <summary>
+        /// 在使用漂移算法时启动的休眠时间，默认500毫秒
+        /// </summary>
+        public virtual TimeSpan SleepTime { get; set; }=TimeSpan.FromMilliseconds(500);
         
         public IdGeneratorOptions()
         {

C#/source/Yitter.IdGenerator/DefaultIdGenerator.cs

@@ -117,7 +117,7 @@ namespace Yitter.IdGenerator
 
             if (options.Method != 2)
             {
-                Thread.Sleep(500);
+                Thread.Sleep(options.SleepTime);
             }
         }