Restructure "Safe Delete" test data directories

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

idea/testData/safeDelete/deleteFunction/kotlinFunctionWithJava/overrideAndImplement1.java

@@ -0,0 +1,9 @@
+class A {
+    public void foo() {
+
+    }
+}
+
+interface Z {
+    void foo();
+}