server: Fix exception while update domain resource count (#3204)

Author: ustcweizhou

engine/schema/src/com/cloud/configuration/dao/ResourceCountDaoImpl.java

@@ -276,17 +276,18 @@ public long countMemoryAllocatedToAccount(long accountId) {
     }
 
     private long executeSqlCountComputingResourcesForAccount(long accountId, String sqlCountComputingResourcesAllocatedToAccount) {
-        try (TransactionLegacy tx = TransactionLegacy.currentTxn()) {
+        TransactionLegacy tx = TransactionLegacy.currentTxn();
+        try {
             PreparedStatement pstmt = tx.prepareAutoCloseStatement(sqlCountComputingResourcesAllocatedToAccount);
             pstmt.setLong(1, accountId);
 
             ResultSet rs = pstmt.executeQuery();
             if (!rs.next()) {
-              throw new CloudRuntimeException(String.format("An unexpected case happened while counting allocated computing resources for account: " + accountId));
+                return 0L;
             }
             return rs.getLong("total");
         } catch (SQLException e) {
             throw new CloudRuntimeException(e);
         }
     }
-}
+}