Minor. Moved test data to subdirectory.

idea/testData/codeInsight/lineMarker/overrideImplement/PropertyOverride.kt

@@ -0,0 +1,7 @@
+open class <lineMarker></lineMarker>Base {
+  open var <lineMarker></lineMarker>writable: Int = 12
+}
+
+class SubBase: Base() {
+  override var <lineMarker></lineMarker>writable: Int = 42
+}