ARTEMIS-2825 wrong calc for DiskStoreUsagePercentage

The calculation used by
ActiveMQServerControlImpl.getDiskStoreUsagePercentage() is incorrect. It
uses disk space info with global-max-size which is for address memory.
Also, the existing getDiskStoreUsage() method *already* returns a
percentage of total disk store usage so this method seems redundant.

artemis-cli/src/main/java/org/apache/activemq/artemis/cli/commands/check/NodeCheck.java

@@ -191,7 +191,7 @@ public class NodeCheck extends CheckAbstract {
          thresholdValue = diskUsage;
       }
 
-      checkNodeUsage(context, "getDiskStoreUsagePercentage", thresholdValue);
+      checkNodeUsage(context, "getDiskStoreUsage", thresholdValue);
    }
 
    private void checkNodeMemoryUsage(final CheckContext context) throws Exception {

artemis-core-client/src/main/java/org/apache/activemq/artemis/api/core/management/ActiveMQServerControl.java

@@ -455,12 +455,6 @@ public interface ActiveMQServerControl {
    @Attribute(desc = "Memory used by all the addresses on broker as a percentage of global maximum limit")
    int getAddressMemoryUsagePercentage();
 
-   /**
-    * Returns the storage used by disk store
-    */
-   @Attribute(desc = "Memory used by the disk store")
-   int getDiskStoreUsagePercentage();
-
    // Operations ----------------------------------------------------
    @Operation(desc = "Isolate the broker", impact = MBeanOperationInfo.ACTION)
    boolean freezeReplication();

artemis-server/src/main/java/org/apache/activemq/artemis/core/management/impl/ActiveMQServerControlImpl.java

@@ -134,8 +134,6 @@ import org.apache.activemq.artemis.utils.SecurityFormatter;
 import org.apache.activemq.artemis.utils.collections.TypedProperties;
 import org.jboss.logging.Logger;
 
-import static org.apache.activemq.artemis.core.server.files.FileStoreMonitor.calculateUsage;
-
 public class ActiveMQServerControlImpl extends AbstractControl implements ActiveMQServerControl, NotificationEmitter, org.apache.activemq.artemis.core.server.management.NotificationListener {
    // Constants -----------------------------------------------------
    private static final Logger logger = Logger.getLogger(ActiveMQServerControlImpl.class);
@@ -753,26 +751,6 @@ public class ActiveMQServerControlImpl extends AbstractControl implements Active
       return (int) result;
    }
 
-   @Override
-   public int getDiskStoreUsagePercentage() {
-      if (AuditLogger.isEnabled()) {
-         AuditLogger.getDiskStoreUsagePercentage(this.server);
-      }
-      long globalMaxSize = getGlobalMaxSize();
-      // no max size set implies 0% used
-      if (globalMaxSize <= 0) {
-         return 0;
-      }
-
-      long diskUsed = getDiskStoreUsage();
-      if (diskUsed <= 0) {
-         return 0;
-      }
-
-      double result = 100 * calculateUsage(diskUsed, globalMaxSize);
-      return (int) result;
-   }
-
    @Override
    public boolean freezeReplication() {
       if (AuditLogger.isEnabled()) {

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/management/ActiveMQServerControlUsingCoreTest.java

@@ -773,16 +773,6 @@ public class ActiveMQServerControlUsingCoreTest extends ActiveMQServerControlTes
             return 0;
          }
 
-         @Override
-         public int getDiskStoreUsagePercentage() {
-            try {
-               return (Integer) proxy.invokeOperation(Integer.TYPE, "getDiskUseStorePercentage");
-            } catch (Exception e) {
-               e.printStackTrace();
-            }
-            return 0;
-         }
-
          @Override
          public boolean freezeReplication() {