vnode/drop: ingore invalid vgroup id if already dropped

src/vnode/src/vnodeMain.c

@@ -122,7 +122,7 @@ int32_t vnodeDrop(int32_t vgId) {
   }
   if (pVnode->dropped) {
     vnodeRelease(pVnode);
-    return TSDB_CODE_VND_INVALID_VGROUP_ID;
+    return TSDB_CODE_SUCCESS;
   }
 
   vInfo("vgId:%d, vnode will be dropped, refCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);

src/vnode/src/vnodeWrite.c

@@ -387,5 +387,5 @@ void vnodeWaitWriteCompleted(SVnodeObj *pVnode) {
     taosMsleep(10);
   }
 
-  taosMsleep(1000);
+  taosMsleep(2100);
 }