Merge pull request #1783 from gregorg/fix_bug_python_2.5_json

Bugfix: in hosts with python-2.5, hash keys needs flatten string.

library/async_status

@@ -89,6 +89,10 @@ def main():
     if not 'started' in data:
         data['finished'] = 1
         data['ansible_job_id'] = jid
+
+    # Fix error: TypeError: exit_json() keywords must be strings
+    data = dict([(str(k), v) for k, v in data.iteritems()])
+
     module.exit_json(**data)
 
 # this is magic, see lib/ansible/module_common.py