Find Usages: Rename test class and move test data

idea/testData/findUsages/libraryUsages/javaLibrary/LibraryMethodUsages.0.kt

@@ -0,0 +1,10 @@
+// PSI_ELEMENT: com.intellij.psi.PsiMethod
+// OPTIONS: usages
+// FIND_BY_REF
+package usages
+
+import library.Foo
+
+fun test() {
+    Foo().<caret>bar(1)
+}