rgw: adding a metadata section for roles.

Signed-off-by: Pritha Srivastava <prsrivas@redhat.com>

src/rgw/rgw_sync.cc

@@ -874,6 +874,7 @@ class RGWFetchAllMetaCR : public RGWCoroutine {
     append_section_from_set(all_sections, "user");
     append_section_from_set(all_sections, "bucket.instance");
     append_section_from_set(all_sections, "bucket");
+    append_section_from_set(all_sections, "roles");
 
     std::move(all_sections.begin(), all_sections.end(),
               std::back_inserter(sections));