Java to Kotlin converter: refactoring and fixing switch conversion

#KT-5390 Fixed

j2k/tests/testData/ast/switch/continueAndBreakWithLabel.java

@@ -0,0 +1,12 @@
+//method
+void foo() {
+Loop:
+  while(true) {
+    switch(take()) {
+      case 1: continue;
+      case 2: System.out.println("2"); return;
+      case 3: break Loop;
+    }
+    System.out.println();
+  }
+}