Bug#25818 No return of NDB share object in failures in open method

- make sure resources are release properly on error

sql/ha_ndbcluster.cc

@@ -5011,27 +5011,36 @@ int ha_ndbcluster::open(const char *name, int mode, uint test_if_locked)
   set_dbname(name);
   set_tabname(name);
   
-  if (check_ndb_connection()) {
-    free_share(m_share); m_share= 0;
-    DBUG_RETURN(HA_ERR_NO_CONNECTION);
+  if ((res= check_ndb_connection()) || 
+      (res= get_metadata(name)))
+  {
+    free_share(m_share);
+    m_share= 0;
+    DBUG_RETURN(res);
   }
-  
-  res= get_metadata(name);
-  if (!res)
+  while (1)
   {
     Ndb *ndb= get_ndb();
     if (ndb->setDatabaseName(m_dbname))
     {
-      ERR_RETURN(ndb->getNdbError());
+      res= ndb_to_mysql_error(&ndb->getNdbError());
+      break;
     }
     struct Ndb_statistics stat;
     res= ndb_get_table_statistics(NULL, false, ndb, m_tabname, &stat);
     records= stat.row_count;
     if(!res)
       res= info(HA_STATUS_CONST);
+    break;
   }
-
+  if (res)
+  {
+    free_share(m_share);
+    m_share= 0;
+    release_metadata();
     DBUG_RETURN(res);
+  }
+  DBUG_RETURN(0);
 }