Fix version of voluptuous to 0.7.2 because of compatibility issues

Author: arcimboldo

setup.py

@@ -49,7 +49,7 @@ def ansible_pb_files():
 
 setup(
     name="elasticluster",
-    version="1.0.1",
+    version="1.0.2",
     description="A command line tool to create, manage and setup computing clusters hosted on a public or private cloud infrastructure.",
     long_description=open('README.rst').read(),
     author="Grid Computing Competence Centre, University of Zurich",
@@ -87,7 +87,7 @@ def ansible_pb_files():
         'google-api-python-client',
         'oauth2client',
         'httplib2',
-        'voluptuous',
+        'voluptuous==0.7.2',
         'configobj'
     ],
     tests_require = ['tox', 'mock', 'nose'],