Code Insight: "Generate secondary constructor" action

#KT-6970 Fixed

idea/testData/codeInsight/generate/secondaryConstructors/javaSupers.java

@@ -0,0 +1,9 @@
+public class Base<X, Y> {
+    public Base(X x) {
+
+    }
+
+    public Base(X x, Y y) {
+
+    }
+}