Mute MixedClusterClientYamlTestSuiteIT (#49721)

Details in #49719
Relates #47983

Author: dliappis

rest-api-spec/src/main/resources/rest-api-spec/test/search/180_locale_dependent_mapping.yml

@@ -1,8 +1,8 @@
 ---
 "Test Index and Search locale dependent mappings / dates":
   - skip:
-      version: " - 6.1.99"
-      reason: JDK9 only supports this with a special sysproperty added in 6.2.0
+      version: "all"
+      reason: "Awaits fix: https://github.com/elastic/elasticsearch/issues/49719"
   - do:
       indices.create:
           index: test_index