clang-tidy: fix misc warnings

The following error reports have started to be reported by clang-tidy:

  * readability-qualified-auto - add 'const' to `auto&` iterators
  * bugprone-use-after-move - add break in loop after element is found

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5314559f62f58aa032d4c74946b8e3e4ce6be808
diff --git a/include/openbmc_dbus_rest.hpp b/include/openbmc_dbus_rest.hpp
index d8a4e66..95503d7 100644
--- a/include/openbmc_dbus_rest.hpp
+++ b/include/openbmc_dbus_rest.hpp
@@ -1768,7 +1768,7 @@
                             }
                             else
                             {
-                                for (auto& prop : properties.items())
+                                for (const auto& prop : properties.items())
                                 {
                                     // if property name is empty, or
                                     // matches our search query, add it