Skip disk usage YAML test (#5885)

Author: stevejgordon

tests/Tests.YamlRunner/SkipList.fs

@@ -183,4 +183,10 @@ let SkipList = dict<SkipFile,SkipSection> [
     // Assertion expects two tokens but creates only one
     // Needs further investigation
     SkipFile "service_accounts/10_basic.yml", All
+
+    // TODO Can we handle the set which is essentially an alias?
+    // Options: 
+    // - Add new alias operation to distinguish intent
+    // - Rewrite the test to avoid the use of the aliases
+    SkipFile "indices.stats/50_disk_usage.yml", Section "Disk usage stats"
 ]