handle metadata with namespaces

[kbarbounakis]

This PR tries to handle types when schema and type names contain namespaces e.g.

{
  "Name": "Products",
  "EntityType": "Product",
  "EntityTypeName": {
    "Name": "Product",
    "Namespace": "App",
    "QualifiedName": "App.Product"
  }
}

where EdmEntitySet.EntityTypeName contains information about the namespace and the full qualified name of an entity type.

AnEdmProperty e.g.

{
  "Immutable": false,
  "Computed": false,
  "Annotations": [],
  "Name": "workLocation",
  "Type": "Place",
  "TypeName": {
    "Name": "Place",
    "Namespace": "App",
    "QualifiedName": "App.Place"
  }
}

contains information about the namespace and the full quailified type name