Recursively convert dict to AttrDict when making an AttrDict (#1154)

Dicts within an AttrDict were not being converted to AttrDicts at
creation/update time. This meant (among other things) when updating,
nested dicts of the same name would be overwritten instead of merged.

ush/python/pygw/src/pygw/attrdict.py

@@ -44,6 +44,8 @@ def __setitem__(self, name, value):
                     object.__getattribute__(self, '__frozen'))
         if isFrozen and name not in super(AttrDict, self).keys():
             raise KeyError(name)
+        if isinstance(value, dict):
+            value = AttrDict(value)
         super(AttrDict, self).__setitem__(name, value)
         try:
             p = object.__getattribute__(self, '__parent')