Fix instantiation of templates(by cloning original symbols). Assigning of scope
for cloned symbol is taken from the symbol which is used to instantiate.
Task-number: QTCREATORBUG-9098
Change-Id: I066cc8b5f69333fabdaf2d4466b205baf08bd3f1
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>