Create tests for identifiers named through derived classes

[LegalizeAdulthood]

Example:

struct Foo {
  static int f;
};

struct Bar : public Foo {
};

int &p = Foo::f;
int &q = Bar::f;

Both p and q refer to the same member, but are qualified by different class names. Adjust test cases to handle such differences in naming.

Refactorings possibly affected:

• Create Multi-Variable Declaration
• Extract Function
• Extract Method
• Extract Parameter
• Extract Variable
• Rename
• Split Multi-Variable Declaration