incorrect type collides with a package

See https://bugs.eclipse.org/bugs/show_bug.cgi?id=558235 for history in this area.

eclipse 4.37.0 (running on windows with a case insensitive file system) when compiling a project like the following:

src/main/java/org/example/Foo.java
src/test/java/org/example/FooTest.java
src/test/resoures/org/example/FooTest/someResource.txt

eclipse generates a error "the type FooTest collides with a package".

This is not true as there is no `org.example.FooTest` package (the existence of a directory does not make for the existence of a package, a package is only present due to a class in said package).

This was previous fixed, regressed, fixed and appears to have regressed again in 4.37