Make UnsafeProxy work on Python 3

Instead of str and unicode we have to deal with bytes and str.

lib/ansible/vars/unsafe_proxy.py

@@ -56,6 +56,26 @@ __all__ = ['UnsafeProxy', 'AnsibleUnsafe', 'wrap_var']
 class AnsibleUnsafe(object):
     __UNSAFE__ = True
 
+try:
+    unicode
+except NameError:
+    # Python 3
+    class AnsibleUnsafeBytes(bytes, AnsibleUnsafe):
+        pass
+
+    class AnsibleUnsafeStr(str, AnsibleUnsafe):
+        pass
+
+    class UnsafeProxy(object):
+        def __new__(cls, obj, *args, **kwargs):
+            if obj.__class__ == str:
+                return AnsibleUnsafeStr(obj)
+            elif obj.__class__ == bytes:
+                return AnsibleUnsafeBytes(obj)
+            else:
+                return obj
+else:
+    # Python 2
     class AnsibleUnsafeStr(str, AnsibleUnsafe):
         pass
 
@@ -71,18 +91,21 @@ class UnsafeProxy(object):
             else:
                 return obj
 
+
 def _wrap_dict(v):
     for k in v.keys():
         if v[k] is not None:
             v[k] = wrap_var(v[k])
     return v
 
+
 def _wrap_list(v):
     for idx, item in enumerate(v):
         if item is not None:
             v[idx] = wrap_var(item)
     return v
 
+
 def wrap_var(v):
     if isinstance(v, dict):
         v = _wrap_dict(v)