Skip testing new name if it isn't known
In we renamed `request_cache` to `request` in the
`_cache/clear` API. But it is only going to be committed back to
5.x so we can't test with the new name in a mixed version
cluster.
---
"clear_cache with request set to false":
+ - skip:
+ version: " - 5.3.99"
+ reason: this name was added in 5.4
+
- do:
indices.clear_cache:
request: false
"clear_cache with request_cache set to false":
- skip:
version: " - 5.3.99"
- reason: deprecation was added in 5.4.0
+ reason: request_cache was deprecated in 5.4.0
features: "warnings"
- do:
