Implement clang-tidy fixes

clang-tidy allows the CI robot to check many things via static analysis.

All changes here were made by the clang-tidy robot, and include a number
of modernization fixes.  updating the tidy file will be done at a later
date.

Signed-off-by: Ed Tanous <etanous@nvidia.com>
Change-Id: I98cc4d600a3c589675507958f6d2350b2141216b
diff --git a/dbus/dbusconfiguration.cpp b/dbus/dbusconfiguration.cpp
index 7e34b55..8b18b4f 100644
--- a/dbus/dbusconfiguration.cpp
+++ b/dbus/dbusconfiguration.cpp
@@ -73,7 +73,7 @@
 
 inline std::string getSensorNameFromPath(const std::string& dbusPath)
 {
-    return dbusPath.substr(dbusPath.find_last_of("/") + 1);
+    return dbusPath.substr(dbusPath.find_last_of('/') + 1);
 }
 
 inline std::string sensorNameToDbusName(const std::string& sensorName)