Bump version to v2.1.5

Author: mpolidori

setup.py

@@ -16,7 +16,7 @@
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # http://packaging.python.org/en/latest/tutorial.html#version
-    version='2.1.1',
+    version='v2.1.5',
 
     description='''CKAN extension that will provide data quering with
                                                 pre configured set of rules''',