disable jvm memory circuit breaker for IT (opensearch-project#2540) (opensearch-project#2544)

Signed-off-by: Jing Zhang <jngz@amazon.com>
(cherry picked from commit b974ed4)

Co-authored-by: Jing Zhang <jngz@amazon.com>

Author: opensearch-trigger-bot[bot]

plugin/src/test/java/org/opensearch/ml/rest/MLCommonsRestTestCase.java

@@ -170,6 +170,7 @@ public void setupSettings() throws IOException {
 
         String jsonEntity = "{\n"
             + "  \"persistent\" : {\n"
+            + "    \"plugins.ml_commons.jvm_heap_memory_threshold\" : 100, \n"
             + "    \"plugins.ml_commons.native_memory_threshold\" : 100 \n"
             + "  }\n"
             + "}";