Show qualified base class names in structure view (PY-3714)

python/testData/structureView/baseClassNames.py

@@ -1,3 +1,5 @@
+import lib1
+
 class B1:
     def f(self, x):
         return x + self.y
@@ -15,3 +17,7 @@ class D1(C):
 
 class D2(C):
     pass
+
+# PY-3714
+class D3(lib1.C):
+    pass