Fix .clang-tidy

camelLower is not a type, camelBack is.

Changes were made automatically with clang-tidy --fix-errors

To be able to apply changes automatically, the only way I've found that
works was to build the version of clang/clang-tidy that yocto has, and
run the fix script within bitbake -c devshell bmcweb.  Unfortunately,
yocto has clang-tidy 11, which can apparently find a couple extra errors
in tests we already had enabled.  As such, a couple of those are also
included.

Tested:
Ran clang-tidy-11 and got a clean result.

Signed-off-by: Ed Tanous <ed@tanous.net>
Change-Id: I9d1080b67f0342229c2f267160849445c065ca51
diff --git a/include/hostname_monitor.hpp b/include/hostname_monitor.hpp
index 7b8283e..1b04af5 100644
--- a/include/hostname_monitor.hpp
+++ b/include/hostname_monitor.hpp
@@ -32,9 +32,9 @@
 }
 
 inline int onPropertyUpdate(sd_bus_message* m, void* /* userdata */,
-                            sd_bus_error* ret_error)
+                            sd_bus_error* retError)
 {
-    if (ret_error == nullptr || sd_bus_error_is_set(ret_error))
+    if (retError == nullptr || sd_bus_error_is_set(retError))
     {
         BMCWEB_LOG_ERROR << "Got sdbus error on match";
         return 0;