Fix importlib import problem

importlib does exist in 2.7, it just doesn't have the reload function.

Author: Conengmo

tests/test_folium.py

@@ -12,10 +12,6 @@
 import os
 import warnings
 import sys
-try:
-    import importlib
-except ImportError:
-    import imp as importlib
 
 import branca.element
 
@@ -36,6 +32,10 @@
 except ImportError:
     import mock
 
+import importlib
+if not hasattr(importlib, 'reload'):
+    import imp as importlib
+
 
 rootpath = os.path.abspath(os.path.dirname(__file__))