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/test/controller_mock.hpp b/test/controller_mock.hpp
index 9a8e7a6..533b6db 100644
--- a/test/controller_mock.hpp
+++ b/test/controller_mock.hpp
@@ -12,7 +12,7 @@
 class ControllerMock : public PIDController
 {
   public:
-    virtual ~ControllerMock() = default;
+    ~ControllerMock() override = default;
 
     ControllerMock(const std::string& id, ZoneInterface* owner) :
         PIDController(id, owner)