Add readability-redundant-* checks

There's a number of redundancies in our code that clang can sanitize
out.  Fix the existing problems, and enable the checks.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ie63d7b7f0777b702fbf1b23a24e1bed7b4f5183b
diff --git a/redfish-core/lib/account_service.hpp b/redfish-core/lib/account_service.hpp
index 8770782..5530e12 100644
--- a/redfish-core/lib/account_service.hpp
+++ b/redfish-core/lib/account_service.hpp
@@ -1191,7 +1191,7 @@
                         messages::success(asyncResp->res);
                         return;
                     },
-                    "xyz.openbmc_project.User.Manager", dbusObjectPath.c_str(),
+                    "xyz.openbmc_project.User.Manager", dbusObjectPath,
                     "org.freedesktop.DBus.Properties", "Set",
                     "xyz.openbmc_project.User.Attributes", "UserEnabled",
                     dbus::utility::DbusVariantType{*enabled});
@@ -1221,7 +1221,7 @@
                         }
                         messages::success(asyncResp->res);
                     },
-                    "xyz.openbmc_project.User.Manager", dbusObjectPath.c_str(),
+                    "xyz.openbmc_project.User.Manager", dbusObjectPath,
                     "org.freedesktop.DBus.Properties", "Set",
                     "xyz.openbmc_project.User.Attributes", "UserPrivilege",
                     dbus::utility::DbusVariantType{priv});
@@ -1250,7 +1250,7 @@
                         messages::success(asyncResp->res);
                         return;
                     },
-                    "xyz.openbmc_project.User.Manager", dbusObjectPath.c_str(),
+                    "xyz.openbmc_project.User.Manager", dbusObjectPath,
                     "org.freedesktop.DBus.Properties", "Set",
                     "xyz.openbmc_project.User.Attributes",
                     "UserLockedForFailedAttempt",