Disable autoscaling capacity test on debian 8 (#67159)

Prior to java 15, ES running on debian 8 will report 0 memory of host,
therefore this test cannot run on debian 8.

Relates #67089

Author: henningandersen

x-pack/plugin/autoscaling/src/internalClusterTest/java/org/elasticsearch/xpack/autoscaling/action/TransportGetAutoscalingCapacityActionIT.java

@@ -6,7 +6,10 @@
 
 package org.elasticsearch.xpack.autoscaling.action;
 
+import org.elasticsearch.action.admin.cluster.node.info.NodesInfoResponse;
+import org.elasticsearch.bootstrap.JavaVersion;
 import org.elasticsearch.env.NodeEnvironment;
+import org.elasticsearch.monitor.os.OsInfo;
 import org.elasticsearch.monitor.os.OsProbe;
 import org.elasticsearch.test.ESIntegTestCase;
 import org.elasticsearch.xpack.autoscaling.AutoscalingIntegTestCase;
@@ -23,8 +26,15 @@
 @ESIntegTestCase.ClusterScope(scope = ESIntegTestCase.Scope.TEST, numDataNodes = 0)
 public class TransportGetAutoscalingCapacityActionIT extends AutoscalingIntegTestCase {
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/67089")
     public void testCurrentCapacity() throws Exception {
+        final NodesInfoResponse response = client().admin().cluster().prepareNodesInfo().execute().actionGet();
+        final boolean anyDebian8Nodes = response.getNodes()
+            .stream()
+            .anyMatch(ni -> ni.getInfo(OsInfo.class).getPrettyName().equals("Debian GNU/Linux 8 (jessie)"));
+        boolean java15Plus = JavaVersion.current().compareTo(JavaVersion.parse("15")) >= 0;
+        // see: https://github.com/elastic/elasticsearch/issues/67089#issuecomment-756114654
+        assumeTrue("cannot run on debian 8 prior to java 15", java15Plus || anyDebian8Nodes == false);
+
         assertThat(capacity().results().keySet(), Matchers.empty());
         long memory = OsProbe.getInstance().getTotalPhysicalMemorySize();
         long storage = internalCluster().getInstance(NodeEnvironment.class).nodePaths()[0].fileStore.getTotalSpace();