Fixing MixedClusterClientYamlTestSuiteIT
This test is failing with 6.3 version for mixedCluster
@@ -66,7 +66,7 @@ setup:
---
"search index prefixes with span_multi":
- skip:
- version: " - 6.3.99"
+ version: " - 6.2.99"
reason: span_multi throws an exception with prefix fields on < versions
- do:
