java usages highlighting: add an additional test for multiple jdk configuration

java/java-tests/testData/codeInsight/multipleJdks/java8/p/InFileReferencesHighlighting2.java

@@ -0,0 +1,7 @@
+package p;
+
+class Test {
+  static void mmm(List7 l) {
+    l.add<caret>All(null);
+  }
+}