fixed out-of-scope nested class definitions, added a test

enabled nested C structs assignment (still disabled for Octave), added Java runtime test
fixed nested_private test case for Java & C#

Examples/test-suite/common.mk

@@ -84,7 +84,6 @@ CPP_TEST_BROKEN += \
 	extend_variable \
 	li_std_vector_ptr \
 	li_boost_shared_ptr_template \
-	nested_private \
 	overload_complicated \
 	template_default_pointer \
 	template_expr \
@@ -279,6 +278,8 @@ CPP_TEST_CASES += \
 	naturalvar_more \
 	nested_class \
 	nested_comment \
+	nested_private \
+	nested_scope \
 	nested_workaround \
 	newobject1 \
 	null_pointer \