Added entry for HDI 5.1 file

Added entry for HDI 5.1 file:
hdinsight-51-component-versioning.md

Author: sreekzz

articles/hdinsight/.openpublishing.redirection.hdinsight.json

@@ -9,6 +9,11 @@
         "redirect_url": "/azure/hdinsight/hdinsight-5x-component-versioning",
         "redirect_document_id": false
     },
+    {
+        "source_path_from_root": "/articles/hdinsight/hdinsight-51-component-versioning.md",
+        "redirect_url": "/azure/hdinsight/hdinsight-5x-component-versioning",
+        "redirect_document_id": false
+    },
     {
         "source_path_from_root": "/articles/hdinsight/hdinsight-machine-learning-overview.md",
         "redirect_url": "/azure/hdinsight/hdinsight-overview",