Fixing violations of E722 for flake8 checks

This change fixes violations of E722, the use of except without
specifying an exception type. For now the high-level Exception
class is used as a generic catchall. In the future these cases
will be updated to handle the specific exceptions expected.

kmip/tests/unit/services/server/crypto/test_engine.py

@@ -2664,7 +2664,7 @@ def load_private_key(key):
             password=None,
             backend=default_backend()
         )
-    except:
+    except Exception:
         return serialization.load_pem_private_key(
             key,
             password=None,