Fix failing cache IT

src/test/java/com/amazon/opendistro/elasticsearch/performanceanalyzer/rca/integTests/tests/cache_tuning/dedicated_master/FieldDataCacheDeciderDedicatedMasterITest.java

@@ -155,5 +155,8 @@ public class FieldDataCacheDeciderDedicatedMasterITest {
     @AErrorPatternIgnored(
             pattern = "CacheUtil:getCacheMaxSize()",
             reason = "Shard request cache metrics is expected to be missing.")
+    @AErrorPatternIgnored(
+            pattern = "OldGenRca:getMaxOldGenSizeOrDefault()",
+            reason = "Old gen metrics is expected to be missing in this integ test.")
     public void testFieldDataCacheAction() {}
 }

src/test/java/com/amazon/opendistro/elasticsearch/performanceanalyzer/rca/integTests/tests/cache_tuning/dedicated_master/ShardRequestCacheDeciderDedicatedMasterITest.java

@@ -171,6 +171,9 @@ public class ShardRequestCacheDeciderDedicatedMasterITest {
     @AErrorPatternIgnored(
             pattern = "CacheUtil:getCacheMaxSize()",
             reason = "Field data cache metrics is expected to be missing.")
+    @AErrorPatternIgnored(
+            pattern = "OldGenRca:getMaxOldGenSizeOrDefault()",
+            reason = "Old gen metrics is expected to be missing in this integ test.")
     public void testShardRequestCacheAction() {
     }
 }

src/test/java/com/amazon/opendistro/elasticsearch/performanceanalyzer/rca/integTests/tests/cache_tuning/multi_node/FieldDataCacheDeciderMultiNodeITest.java

@@ -155,5 +155,8 @@ public class FieldDataCacheDeciderMultiNodeITest {
     @AErrorPatternIgnored(
             pattern = "CacheUtil:getCacheMaxSize()",
             reason = "Shard request cache metrics is expected to be missing.")
+    @AErrorPatternIgnored(
+            pattern = "OldGenRca:getMaxOldGenSizeOrDefault()",
+            reason = "Old gen metrics is expected to be missing in this integ test.")
     public void testFieldDataCacheAction() {}
 }

src/test/java/com/amazon/opendistro/elasticsearch/performanceanalyzer/rca/integTests/tests/cache_tuning/multi_node/ShardRequestCacheDeciderMultiNodeITest.java

@@ -171,6 +171,9 @@ public class ShardRequestCacheDeciderMultiNodeITest {
     @AErrorPatternIgnored(
             pattern = "CacheUtil:getCacheMaxSize()",
             reason = "Field data cache metrics is expected to be missing.")
+    @AErrorPatternIgnored(
+            pattern = "OldGenRca:getMaxOldGenSizeOrDefault()",
+            reason = "Old gen metrics is expected to be missing in this integ test.")
     public void testShardRequestCacheAction() {
     }
 }