Remove casts for TaskManager implementation

It causes problems when profiling is enabled (as the autowired
object is a proxy instance instead of direct implementation class).

repo/task-quartz-impl/src/main/java/com/evolveum/midpoint/task/quartzimpl/TaskManagerConfiguration.java

@@ -23,6 +23,7 @@
 import com.evolveum.midpoint.util.logging.TraceManager;
 import org.apache.commons.configuration.Configuration;
 import org.apache.commons.lang.StringUtils;
+import org.springframework.stereotype.Component;
 
 import java.util.Arrays;
 import java.util.HashMap;
@@ -43,6 +44,7 @@
  *
  * @author Pavol Mederly
  */
+@Component
 public class TaskManagerConfiguration {
 
     private static final transient Trace LOGGER = TraceManager.getTrace(TaskManagerConfiguration.class);

repo/task-quartz-impl/src/main/java/com/evolveum/midpoint/task/quartzimpl/TaskManagerQuartzImpl.java

@@ -118,8 +118,10 @@ public class TaskManagerQuartzImpl implements TaskManager, BeanFactoryAware {
     private static final String DOT_IMPL_CLASS = TaskManagerQuartzImpl.class.getName() + ".";
     private static final String CLEANUP_TASKS = DOT_INTERFACE + "cleanupTasks";
 
+    @Autowired
+    private TaskManagerConfiguration configuration;
+
     // instances of all the helper classes (see their definitions for their description)
-    private TaskManagerConfiguration configuration = new TaskManagerConfiguration();
     private ExecutionManager executionManager = new ExecutionManager(this);
     private ClusterManager clusterManager = new ClusterManager(this);
     private StalledTasksWatcher stalledTasksWatcher = new StalledTasksWatcher(this);
@@ -1665,10 +1667,6 @@ public RepositoryService getRepositoryService() {
         return repositoryService;
     }
 
-    public void setConfiguration(TaskManagerConfiguration configuration) {
-        this.configuration = configuration;
-    }
-
     public ExecutionManager getExecutionManager() {
         return executionManager;
     }

repo/task-quartz-impl/src/main/java/com/evolveum/midpoint/task/quartzimpl/handlers/NoOpTaskHandler.java

@@ -44,7 +44,7 @@ public class NoOpTaskHandler implements WorkBucketAwareTaskHandler {
 
 	private NoOpTaskHandler() {}
 
-	public static void instantiateAndRegister(TaskManager taskManager) {
+	public static void instantiateAndRegister(TaskManagerQuartzImpl taskManager) {
 		if (instance == null) {
 			instance = new NoOpTaskHandler();
 		}
@@ -53,7 +53,7 @@ public static void instantiateAndRegister(TaskManager taskManager) {
 		taskManager.registerHandler(TaskConstants.NOOP_TASK_HANDLER_URI_2, instance);
 		taskManager.registerHandler(TaskConstants.NOOP_TASK_HANDLER_URI_3, instance);
 		taskManager.registerHandler(TaskConstants.NOOP_TASK_HANDLER_URI_4, instance);
-		instance.taskManagerImpl = (TaskManagerQuartzImpl) taskManager;
+		instance.taskManagerImpl = taskManager;
 	}
 
 	@Override

repo/task-quartz-impl/src/main/java/com/evolveum/midpoint/task/quartzimpl/handlers/PartitioningTaskHandler.java

@@ -53,10 +53,10 @@ public class PartitioningTaskHandler implements TaskHandler {
 
 	private static final String DEFAULT_HANDLER_URI = "{masterTaskHandlerUri}#{index}";
 
-	private TaskManager taskManager;
+	private TaskManagerQuartzImpl taskManager;
 	private Function<Task, TaskPartitionsDefinition> partitionsDefinitionSupplier;
 
-	public PartitioningTaskHandler(TaskManager taskManager, Function<Task, TaskPartitionsDefinition> partitionsDefinitionSupplier) {
+	public PartitioningTaskHandler(TaskManagerQuartzImpl taskManager, Function<Task, TaskPartitionsDefinition> partitionsDefinitionSupplier) {
 		this.taskManager = taskManager;
 		this.partitionsDefinitionSupplier = partitionsDefinitionSupplier;
 	}
@@ -333,7 +333,7 @@ private <T> T applyDefaults(Function<TaskPartitionDefinition, T> localGetter, Fu
 	}
 
 	private PrismContext getPrismContext() {
-		return ((TaskManagerQuartzImpl) taskManager).getPrismContext();
+		return taskManager.getPrismContext();
 	}
 
 	private void applyDeltas(TaskType subtask, Collection<ItemDelta<?, ?>> deltas) throws SchemaException {

repo/task-quartz-impl/src/main/java/com/evolveum/midpoint/task/quartzimpl/handlers/WaitForSubtasksByPollingTaskHandler.java

@@ -49,11 +49,11 @@ public class WaitForSubtasksByPollingTaskHandler implements TaskHandler {
 
 	private WaitForSubtasksByPollingTaskHandler() {}
 
-	public static void instantiateAndRegister(TaskManager taskManager) {
+	public static void instantiateAndRegister(TaskManagerQuartzImpl taskManager) {
 		if (instance == null)
 			instance = new WaitForSubtasksByPollingTaskHandler();
 		taskManager.registerHandler(HANDLER_URI, instance);
-		instance.taskManagerImpl = (TaskManagerQuartzImpl) taskManager;
+		instance.taskManagerImpl = taskManager;
 	}
 
 	@Override

repo/task-quartz-impl/src/main/java/com/evolveum/midpoint/task/quartzimpl/handlers/WaitForTasksTaskHandler.java

@@ -26,8 +26,6 @@
 import com.evolveum.midpoint.util.logging.Trace;
 import com.evolveum.midpoint.util.logging.TraceManager;
 
-import java.util.List;
-
 /**
  * This is very simple task handler that causes the process to enter WAITING for OTHER_TASKS state.
  *
@@ -43,12 +41,12 @@ public class WaitForTasksTaskHandler implements TaskHandler {
 
 	private WaitForTasksTaskHandler() {}
 
-	public static void instantiateAndRegister(TaskManager taskManager) {
+	public static void instantiateAndRegister(TaskManagerQuartzImpl taskManager) {
 		if (instance == null) {
 			instance = new WaitForTasksTaskHandler();
         }
 		taskManager.registerHandler(HANDLER_URI, instance);
-		instance.taskManagerImpl = (TaskManagerQuartzImpl) taskManager;
+		instance.taskManagerImpl = taskManager;
 	}
 
 	@Override

repo/task-quartz-impl/src/main/java/com/evolveum/midpoint/task/quartzimpl/work/WorkStateManager.java

@@ -35,7 +35,6 @@
 import com.evolveum.midpoint.task.api.TaskExecutionStatus;
 import com.evolveum.midpoint.task.api.TaskManager;
 import com.evolveum.midpoint.task.quartzimpl.TaskManagerConfiguration;
-import com.evolveum.midpoint.task.quartzimpl.TaskManagerQuartzImpl;
 import com.evolveum.midpoint.task.quartzimpl.TaskQuartzImpl;
 import com.evolveum.midpoint.task.quartzimpl.work.segmentation.content.WorkBucketContentHandler;
 import com.evolveum.midpoint.task.quartzimpl.work.segmentation.content.WorkBucketContentHandlerRegistry;
@@ -85,6 +84,7 @@ public class WorkStateManager {
 	@Autowired private PrismContext prismContext;
 	@Autowired private WorkSegmentationStrategyFactory strategyFactory;
 	@Autowired private WorkBucketContentHandlerRegistry handlerFactory;
+	@Autowired private TaskManagerConfiguration configuration;
 
 	private static final long DYNAMIC_SLEEP_INTERVAL = 100L;
 
@@ -254,22 +254,18 @@ private WorkBucketType getWorkBucketMultiNode(Context ctx, long freeBucketWaitTi
 	}
 
 	private BackoffComputer createBackoffComputer() {
-		TaskManagerConfiguration c = getConfiguration();
+		TaskManagerConfiguration c = configuration;
 		return new ExponentialBackoffComputer(c.getWorkAllocationMaxRetries(), c.getWorkAllocationInitialDelay(),
 				c.getWorkAllocationRetryExponentialThreshold());
 	}
 
 	private long getFreeBucketWaitInterval() {
 		return freeBucketWaitIntervalOverride != null ? freeBucketWaitIntervalOverride :
-				getConfiguration().getWorkAllocationDefaultFreeBucketWaitInterval();
+				configuration.getWorkAllocationDefaultFreeBucketWaitInterval();
 	}
 
 	private long getInitialDelay() {
-		return getConfiguration().getWorkAllocationInitialDelay();
-	}
-
-	private TaskManagerConfiguration getConfiguration() {
-		return ((TaskManagerQuartzImpl) taskManager).getConfiguration();
+		return configuration.getWorkAllocationInitialDelay();
 	}
 
 	private void setOrUpdateEstimatedNumberOfBuckets(Task task, WorkSegmentationStrategy workStateStrategy, OperationResult result)