[components] Fix setting attributes into scoped model on component init

[cray0000]

Related to #418
There are couple of cases when attribute's original path can not be resolved (when attribute is ParentWrapper):

1. When passing the same attribute from one component into another, like described in attributeContext issue, parameters wrapped in ParentWrapper #418.
2. When having some complicated argument's value, like

    <view name='payment' payload='{{ { price: 500, params: #root._page.paymentParams } }}'>

currently those kind of attributes end up being ParentWrappers inside component's model

While there is probably a solution to the 1st case, I don't think there is a simple solution to the 2nd one (it can be implemented in theory though - by automatically creating a reactive functions for this kind of argument values or something like that).
So when ParentWrapper attribute fails to resolve it's original path for creating a ref we should at least init component's model with its renderValue.