move postfix templates to java-impl

java/java-tests/testData/codeInsight/template/postfix/templates/if/unresolvedVariable.java

@@ -0,0 +1,8 @@
+package templates;
+
+public class Foo {
+    void m(int value) {
+        b.if<caret>
+        value = 123;
+    }
+}