test REFACTOR reorganization in ::test_typedef()

Changing the order of tests and adding a description.
Also the function is renamed.
diff --git a/tests/utests/schema/test_schema.c b/tests/utests/schema/test_schema.c
index 3c49977..df30d44 100644
--- a/tests/utests/schema/test_schema.c
+++ b/tests/utests/schema/test_schema.c
@@ -42,7 +42,7 @@
 void test_getnext(void **state);
 void test_date(void **state);
 void test_revisions(void **state);
-void test_typedef(void **state);
+void test_collision_typedef(void **state);
 void test_accessible_tree(void **state);
 void test_includes(void **state);
 
@@ -62,7 +62,7 @@
         UTEST(test_getnext),
         UTEST(test_date),
         UTEST(test_revisions),
-        UTEST(test_typedef),
+        UTEST(test_collision_typedef),
         UTEST(test_accessible_tree),
         UTEST(test_includes),