Merge pull request #172 in DESIGN/design from ~JU/design:release/10.0 to release/10.0

* commit 'c82a3578cfeb5c76f633f035330ab3dc9567dc2f':
  REPORT-9257 【10.0集群】【性能】500并发压测5w*5明细表，节点宕机 无数线程卡在ReportClassMananger.getInstance()了 todo：后面整理下这几个ClassManager

designer-base/src/com/fr/design/ExtraDesignClassManager.java

@@ -47,7 +47,7 @@ public class ExtraDesignClassManager extends AbstractExtraClassManager implement
 
     private Set<ShortCut> shortCuts = new CloseableContainedSet<>(HashSet.class);
     
-    public synchronized static ExtraDesignClassManager getInstance() {
+    public static ExtraDesignClassManager getInstance() {
         return classManager;
     }