Cryptopia: handle_errors fix
Cryptopia: handle_errors fix

In Python, `False` is spelled with a capital F. So a cryptopia error is like:
`{'Success': False, 'Error': 'ERROR: Insufficient Funds.', 'Data': None}`
`self.safe_string(response, 'Success')` then is `'False'` which should get lowercased before comparing to 'false'.

Proposed fix is to lowercase in all languages before checking equality.
ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt,ccxt/ccxt