修改MemoryLockProvider初始化bug

stmms-biz/src/main/java/cn/com/qmth/stmms/biz/lock/impl/MemoryLockProvider.java

@@ -21,7 +21,7 @@ import cn.com.qmth.stmms.common.enums.LockType;
 @Component("memoryLockProvider")
 public class MemoryLockProvider implements LockProvider {
 
-    private Map<LockType, Map<String, AtomicBoolean>> lockMap;
+    private Map<LockType, Map<String, AtomicBoolean>> lockMap = new HashMap<>();
 
     @Override
     public void waitLock(LockType type, String key) {