Restructure "Safe Delete" test data directories

Conflicts:
	generators/org/jetbrains/jet/generators/tests/GenerateTests.java

idea/testData/safeDelete/deleteFunction/kotlinFunction/overrideAndImplement2.kt

@@ -0,0 +1,15 @@
+open class A {
+    open fun <caret>foo() {
+
+    }
+}
+
+trait Z {
+    fun foo()
+}
+
+class B: A, Z {
+    override fun foo() {
+
+    }
+}