IDEA-165006 Support chained completion for method references in Java 8+

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/completion/normal/ChainedMethodReference.java

@@ -0,0 +1,5 @@
+class A {
+  {
+    Runnable r = Syst::setOu<caret>
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/completion/normal/ChainedMethodReference_after.java

@@ -0,0 +1,5 @@
+class A {
+  {
+    Runnable r = System::setOut;<caret>
+  }
+}