Suppressed pylint warnings in test_crypto

src/tests/test_crypto.py

@@ -31,6 +31,7 @@ pubkey_sha = _sha.digest()
 
 class RIPEMD160TestCase(object):
     """Base class for RIPEMD160 test case"""
+    # pylint: disable=too-few-public-methods,no-member
     __metaclass__ = ABCMeta
 
     @abstractmethod