generate constructor: place varargs from base constructor as last parameter (IDEA-142811)

java/java-tests/testData/codeInsight/generateConstructor/afterBaseVarargs.java

@@ -0,0 +1,11 @@
+class Base {
+  public Base(String... ignored) { }
+}
+class Derived extends Base {
+  int i;
+
+    public Derived(int i, String... ignored) {
+        super(ignored);
+        this.i = i;
+    }
+}

java/java-tests/testData/codeInsight/generateConstructor/beforeBaseVarargs.java

@@ -0,0 +1,8 @@
+class Base {
+  public Base(String... ignored) { }
+}
+class Derived extends Base {
+  int i;
+
+  <caret>
+}