Report warning for several modules with same name on module path

compiler/testData/javaModules/severalModulesWithTheSameName/main/usage.kt

@@ -0,0 +1,8 @@
+import foo.Foo
+import bar.Bar
+
+fun usage(): String {
+    val f: Foo = Foo()
+    val b: Bar = Bar()
+    return "$f$b"
+}