The important changes are in ideaTestUtils.kt:
`configureByFiles` must be called on the relative to testData dir path,
otherwise java files in the project belong to src/idea/testData/.../A.java
instead of src/A.java and can't be found in the root package
New updates in resolution when resolving A() call is now asking whether
<root>.A exists in PsiPackage::getClasses instead of
PsiPackage::findClassByShortName that can find a class even if it's located
in the wrong directory
Denis Zharkov
12b348ae48