Don't retry LicenseExceptions

Author: mythz

src/ServiceStack.Redis/RedisNativeClient_Utils.cs

@@ -527,7 +527,8 @@ protected T SendReceive<T>(byte[][] cmdWithBinaryArgs,
                 catch (Exception outerEx)
                 {
                     var retryableEx = outerEx as RedisRetryableException;
-                    if (retryableEx == null && outerEx is RedisException)
+                    if (retryableEx == null && outerEx is RedisException 
+                        || outerEx is LicenseException)
                     {
                         ResetSendBuffer();
                         throw;