Java to Kotlin converter: do not produce incorrect "code blocks" which are actually parsed as lambda's in Kotlin

#KT-4670 Fixed

j2k/tests/testData/ast/blocks/Blocks.java

@@ -0,0 +1,16 @@
+//method
+void foo() {
+    {
+        int a = 1;
+        bar(a);
+    }
+
+    {
+        int a = 2;
+        bar(a);
+    }
+
+    {
+        bar(3);
+    }
+}