Disable bitvavo candle test temporarily after downtime

tests/exchange/test_ccxt_compat.py

@@ -544,6 +544,8 @@ class TestCCXTExchange:
         if exchangename in ('bittrex'):
             # For some weired reason, this test returns random lengths for bittrex.
             pytest.skip("Exchange doesn't provide stable ohlcv history")
+        if exchangename in ('bitvavo'):
+            pytest.skip("Exchange Downtime ")
 
         if not exc._ft_has['ohlcv_has_history']:
             pytest.skip("Exchange does not support candle history")