Fix import error on systems without libsasl2.so.3

Author: jgiannuzzi

src/confluent_kafka/cimpl/__init__.py

@@ -10,7 +10,7 @@
             if not name.startswith("__"):
                 globals()[name] = getattr(module, name)
         break
-    except ModuleNotFoundError:
+    except ImportError:
         pass
 
 if variant is None: